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  • A mesoscopic study of the excitatory/inhibitory coupling effect on synchronization and segregation

     Pons Rivero, Antonio Javier; Malagarriga Guasch, Daniel; Garcia Ojalvo, Jorge
    NETT Summer School
    Presentation's date: 2013-07-01
    Presentation of work at congresses

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  • Cómo se fracturan los materiales

     Pons Rivero, Antonio Javier
    Investigación y ciencia
    Date of publication: 2013-01-01
    Journal article

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  • Neuronal oscillations: from single-unit activity to emergent dynamics and back  Open access

     De Sancristobal Alonso, Belen
    Defense's date: 2013-07-22
    Department of Physics and Nuclear Engineering, Universitat Politècnica de Catalunya
    Theses

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    L’objectiu principal d’aquesta tesi és avançar en la comprensió del processament d’informació en xarxes neuronals en presència d’oscil lacions subumbrals. La majoria de neurones propaguen la seva activitat elèctrica a través de sinapsis químiques que són activades, exclusivament, quan el corrent elèctric que les travessa supera un cert llindar. És per aquest motiu que les descàrregues ràpides i intenses produïdes al soma neuronal, els anomenats potencials d’acció, són considerades la unitat bàsica d’informació neuronal, és a dir, el senyal mínim i necessari per a iniciar la comunicació entre dues neurones. El codi neuronal és entès, doncs, com un llenguatge binari que expressa qualsevol missatge (estímul sensorial, memòries, etc.) en un tren de potencials d’acció. Tanmateix, cap funció cognitiva rau en la dinàmica d’una única neurona. Circuits de milers de neurones connectades entre sí donen lloc a determinats ritmes, palesos en registres d’activitat colectiva com els electroencefalogrames (EEG) o els potencials de camp local (LFP). Si els potencials d’acció de cada cèl lula, desencadenats per fluctuacions estocàstiques de les corrents sinàptiques, no assolissin un cert grau de sincronia, no apareixeria aquesta periodicitat a nivell de xarxa. Per tal de poder entendre si aquests ritmes intervenen en el codi neuronal hem estudiat tres situacions. Primer, en el Capítol 2, hem mostrat com una cadena oberta de neurones amb un potencial de membrana intrínsecament oscil latori filtra un senyal periòdic arribant per un dels extrems. La resposta de cada neurona (pulsar o no pulsar) depèn de la seva fase, de forma que cada una d’elles rep un missatge filtrat per la precedent. A més, cada potencial d’acció presinàptic provoca un canvi de fase en la neurona postsinàptica que depèn de la seva posició en l’espai de fases. Els períodes d’entrada capaços de sincronitzar les oscil lacions subumbrals són aquells que mantenen la fase d’arribada dels potencials d’acció fixa al llarg de la cadena. Per tal de què el missatge arribi intacte a la darrera neurona cal, a més a més, que aquesta fase permeti la descàrrega del voltatge transmembrana. En segon cas, hem estudiat una xarxa neuronal amb connexions tant a veïns propers com de llarg abast, on les oscil lacions subumbrals emergeixen de l’activitat col lectiva reflectida en els corrents sinàptics (o equivalentment en el LFP). Les neurones inhibidores aporten un ritme a l’excitabilitat de la xarxa, és a dir, que els episodis en què la inhibició és baixa, la probabilitat d’una descàrrega global de la població neuronal és alta. En el Capítol 3 mostrem com aquest ritme implica l’aparició d’una bretxa en la freqüència de descàrrega de les neurones: o bé polsen espaiadament en el temps o bé en ràfegues d’elevada intensitat. La fase del LFP determina l’estat de la xarxa neuronal codificant l’activitat de la població: els mínims indiquen la descàrrega simultània de moltes neurones que, ocasionalment, han superat el llindar d’excitabilitat degut a un decreixement global de la inhibició, mentre que els màxims indiquen la coexistència de ràfegues en diferents punts de la xarxa degut a decreixements locals de la inhibició en estats globals d’excitació. Aquesta dinàmica és possible gràcies al domini de la inhibició sobre l’excitació. En el Capítol 4 considerem acoblament entre dues xarxes neuronals per tal d’estudiar la interacció entre ritmes diferents. Les oscil lacions indiquen recurrència en la sincronització de l’activitat col lectiva, de manera que durant aquestes finestres temporals una població optimitza el seu impacte en una xarxa diana. Quan el ritme de la població receptora i el de l’emissora difereixen significativament, l’eficiència en la comunicació decreix, ja que les fases de màxima resposta de cada senyal LFP no mantenen una diferència constant entre elles. Finalment, en el Capítol 5 hem estudiat com les oscil lacions col lectives pròpies de l’estat de son donen lloc al fenomen de coherència estocàstica. Per a una intensitat òptima del soroll, modulat per l’excitabilitat de la xarxa, el LFP assoleix una regularitat màxima donant lloc a un període refractari de la població neuronal. En resum, aquesta Tesi mostra escenaris d’interacció entre els potencials d’acció, característics de la dinàmica de neurones individuals, i les oscil lacions subumbrals, fruit de l’acoblament entre les cèl lules i ubiqües en la dinàmica de poblacions neuronals. Els resultats obtinguts aporten funcionalitat a aquests ritmes emergents, agents sincronitzadors i moduladors de les descàrregues neuronals i reguladors de la comunicació entre xarxes neuronals.

    The main objective of this thesis is to better understand information processing in neuronal networks in the presence of subthreshold oscillations. Most neurons propagate their electrical activity via chemical synapses, which are only activated when the electric current that passes through them surpasses a certain threshold. Therefore, fast and intense discharges produced at the neuronal soma (the action potentials or spikes) are considered the basic unit of neuronal information. The neuronal code is understood, then, as a binary language that expresses any message (sensory stimulus, memories, etc.) in a train of action potentials. Circuits of thousands of interconnected neurons give rise to certain rhythms, revealed in collective activity measures such as electroencephalograms (EEG) and local field potentials (LFP). Synchronization of action potentials of each cell, triggered by stochastic fluctuations of the synaptic currents, cause this periodicity at the network level.To understand whether these rhythms are involved in the neuronal code we studied three situations. First, in Chapter 2, we showed how an open chain of neurons with an intrinsically oscillatory membrane potential filters a periodic signal coming from one of its ends. The response of each neuron (to spike or not) depends on its phase, so that each cell receives a message filtered by the preceding one. Each presynaptic action potential causes a phase change in the postsynaptic neuron, which depends on its position in the phase space. Those incoming periods that are able to synchronize the subthreshold oscillations, keep the phase of arrival of action potentials fixed along the chain. The original message reaches intact the last neuron provided that this phase allows the discharge of the transmembrane voltage.I the second case, we studied a neuronal network with connections to both long range and close neighbors, in which the subthreshold oscillations emerge from the collective activity apparent in the synaptic currents. The inhibitory neurons provide a rhythm to the excitability of the network. When inhibition is low, the likelihood of a global discharge of the neuronal population is high. In Chapter 3 we show how this rhythm causes a gap in the discharge frequency of neurons: either they pulse single spikes or they fire bursts of high intensity. The LFP phase determines the state of the neuronal network, coding the activity of the population: its minima indicate the simultaneous discharge of many neurons, while its maxima indicate the coexistence of bursts due to local decreases of inhibition at global states of excitation. In Chapter 4 we consider coupling between two neural networks in order to study the interaction between different rhythms. The oscillations indicate recurrence in the synchronization of collective activity, so that during these time windows a population optimizes its impact on a target network. When the rhythm of the emitter and receiver population differ significantly, the communication efficiency decreases as the phases of maximum response of each LFP signal do not maintain a constant difference between them.Finally, in Chapter 5 we studied how oscillations typical of the collective sleep state give rise to stochastic coherence. For an optimal noise intensity, modulated by the excitability of the network, the LFP reaches a maximal regularity leading to a refractory period of the neuronal population.In summary, this Thesis shows scenarios of interaction between action potentials, characteristics of the dynamics of individual neurons, and the subthreshold oscillations, outcome of the coupling between the cells and ubiquitous in the dynamics of neuronal populations . The results obtained provide functionality to these emerging rhythms, triggers of synchronization and modulator agents of the neuronal discharges and regulators of the communication between neuronal networks.

  • ESTOCASTICIDAD EN SISTEMAS COMPLEJOS NOLINEALES

     Pons Rivero, Antonio Javier; Torrent Serra, Maria Del Carmen; Masoller Alonso, Cristina; Pigolotti, Simone; Ramirez de La Piscina Millan, Laureano; Peñaranda Ayllon, Angelina; Malagarriga Guasch, Daniel; Dies Miracle, Marta; Aragoneses Aguado, Andres; Deza, Juan Ignacio; Garcia Ojalvo, Jorge
    Participation in a competitive project

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  • Synchronizability and dynamics of coupled neural mass oscillators

     Malagarriga Guasch, Daniel; Garcia Ojalvo, Jorge; Pons Rivero, Antonio Javier
    International Symposium on Nonlinear Theory and its Applications
    Presentation's date: 2012-10-24
    Presentation of work at congresses

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  • Exploring the dynamics of Boolean networks using Python: application to cell signaling networks

     Pons Rivero, Antonio Javier; Abad, Elena; Rue Queralt, Pau
    Workshop IBERSINC
    Presentation's date: 2012-09-04
    Presentation of work at congresses

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  • Modelos físicos de actividad cerebral: de la micro- a la macro-escala

     Pons Rivero, Antonio Javier; Garcia Ojalvo, Jorge
    Revista española de física
    Date of publication: 2012-09-01
    Journal article

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  • Cracks tamed

     Pons Rivero, Antonio Javier
    Nature
    Date of publication: 2012-05-10
    Journal article

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    Crack propagation in materials is rarely welcome. But carefully engineered cracks produced during the deposition of a film on silicon can be used to efficiently create pre-designed patterns of nanometre-scale channels.

  • NEURAL ENGINEERING TRANSFORMATIVE TECHNOLOGIES

     Pons Rivero, Antonio Javier; Torrent Serra, Maria Del Carmen; Masoller Alonso, Cristina; Garcia Ojalvo, Jorge
    Participation in a competitive project

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  • Noise-induced up/down dynamics in scale-free neuronal networks

     Grau Moya, Jordi; Pons Rivero, Antonio Javier; Garcia Ojalvo, Jorge
    International journal of bifurcation and chaos
    Date of publication: 2012-07-31
    Journal article

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    Cortical neuronal networks are known to exhibit regimes of dynamical activity characterized by periods of elevated firing (up states) separated by silent phases (down states). Here, we show that up/down dynamics may emerge spontaneously in scale-free neuronal networks, provided an optimal amount of noise acts upon all network nodes. Our conclusions are drawn from numerical simulations of networks of subthreshold integrate-and-fire neurons, connected to each other according to a scale-free topology. We study the structure of the up/down regime both in time and in terms of the node degree. We also examine whether localized random perturbations applied to specific network nodes are able to generate up/down dynamics, showing that this regime arises when noisy inputs are applied to low-degree (nonhub) network nodes, but not when they act upon network hubs.

  • Integration of cellular signals in chattering environments

     Rué Queralt, Pau; Domedel Puig, Nuria; Garcia Ojalvo, Jorge; Pons Rivero, Antonio Javier
    Progress in biophysics and molecular biology
    Date of publication: 2012-09-08
    Journal article

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  • Neural oscillations: from mechanisms to functionality

     Pons Rivero, Antonio Javier; De Sancristobal Alonso, Belen; Garcia Ojalvo, Jorge
    Barcelona Computational and Systems Neuroscience Meeting
    Presentation's date: 2011-06-14
    Presentation of work at congresses

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  • The helical crack-front instability

     Pons Rivero, Antonio Javier; Karma, Alain
    Congreso de Física Estadística
    Presentation's date: 2011-06-03
    Presentation of work at congresses

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  • Modulating the Phase Coherence of Neuronal Population Oscillations in the Gamma Band

     De Sancristobal Alonso, Belen; Vicente, Raul; Pons Rivero, Antonio Javier; Pipa, Gordon; Garcia Ojalvo, Jorge
    International Conference on Cognitive Neurodynamics
    Presentation of work at congresses

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  • Modeling signaling information processing through a Boolean network

     Pons Rivero, Antonio Javier; Domedel Puig, Nuria; Rué Queralt, Pau; Garcia Ojalvo, Jorge
    International Congress on Molecular Systems Biology
    Presentation's date: 2011-05-12
    Presentation of work at congresses

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  • Access to the full text
    Information routing driven by background chatter in a signaling network  Open access

     Domedel Puig, Nuria; Rué Queralt, Pau; Pons Rivero, Antonio Javier; Garcia Ojalvo, Jorge
    PLOS computational biology
    Date of publication: 2011-12-08
    Journal article

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    Living systems are capable of processing multiple sources of information simultaneously. This is true even at the cellular level, where not only coexisting signals stimulate the cell, but also the presence of fluctuating conditions is significant. When information is received by a cell signaling network via one specific input, the existence of other stimuli can provide a background activity –or chatter– that may affect signal transmission through the network and, therefore, the response of the cell. Here we study the modulation of information processing by chatter in the signaling network of a human cell, specifically, in a Boolean model of the signal transduction network of a fibroblast. We observe that the level of external chatter shapes the response of the system to information carrying signals in a nontrivial manner, modulates the activity levels of the network outputs, and effectively determines the paths of information flow. Our results show that the interactions and node dynamics, far from being random, confer versatility to the signaling network and allow transitions between different information-processing scenarios.

  • From structural to functional connectivity in aging brains: a neural mass modeling

     Pons Rivero, Antonio Javier; Cantero, José Luis; Atienza, Mercedes; Garcia Ojalvo, Jorge
    Annual Meeting of the Organization for Human Brain Mapping
    Presentation's date: 2010-06-07
    Presentation of work at congresses

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  • Relaxation dynamics and frequency response of a noisy cell signaling network

     Rué Queralt, Pau; Pons Rivero, Antonio Javier; Domedel Puig, Nuria; Garcia Ojalvo, Jorge
    Chaos
    Date of publication: 2010-12-30
    Journal article

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  • DINAMICA NOLINEAL Y ESTOCASTICA EN SISTEMAS FISICOS Y BIOFISICOS

     Zamora Munt, Jordi; Masoller Alonso, Cristina; Domedel Puig, Nuria; Torrent Serra, Maria Del Carmen; Espinar Calvo, Maria Lorena; De Sancristobal Alonso, Belen; Pons Rivero, Antonio Javier; Tiana Alsina, Jordi; Rue Queralt, Pau; Dies Miracle, Marta; Garcia Ojalvo, Jorge
    Participation in a competitive project

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  • Relating structural and functional anomalous connectivity in the aging brain via neural mass modeling

     Pons Rivero, Antonio Javier; Cantero, Jose Luis; Atienza, Mercedes; Garcia Ojalvo, Jorge
    Neuroimage
    Date of publication: 2010-09
    Journal article

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    The structural changes that arise as the brain ages influence its functionality. In many cases, the anatomical degradation simply leads to normal aging. In others, the neurodegeneration is large enough to cause neurological disorders (e.g. Alzheimer's disease). Structure and function can be both currently measured using noninvasive techniques, such as magnetic resonance imaging (MRI) and electroencephalography (EEG) respectively. However, a full theoretical scheme linking structural and functional degradation is still lacking. Here we present a neural mass model that aims to bridge both levels of description and that reproduces experimentally observed multichannel EEG recordings of alpha rhythm in young subjects, healthy elderly subjects, and patients with mild cognitive impairment. We focus our attention in the dominant frequency of the signals at different electrodes and in the correlation between specific electrode pairs, measured via the phase-lag index. Our model allows us to study the influence of different structural connectivity pathways, independently of each other, on the normal and aberrantly aging brain. In particular, we study in detail the effect of the thalamic input on specific cortical regions, the long-range connectivity between cortical regions, and the short-range coupling within the same cortical area. Once the influence of each type of connectivity is determined, we characterize the regions of parameter space compatible with the EEG recordings of the populations under study. Our results show that the different types of connectivity must be fine-tuned to maintain the brain in a healthy functioning state independently of its age and brain condition.

  • Helical crack-front instability in mixed-mode fracture

     Pons Rivero, Antonio Javier; Karma, Alain
    Nature
    Date of publication: 2010-03-04
    Journal article

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    [...]We show that the dynamically preferred unstable wavelength is governed by the balance of the destabilizing effect of far-field stresses and the stabilizing effect of cohesive forces on the process zone scale, and we derive a theoretical estimate for this scale using a new propagation law for curved cracks in three dimensions. The rotation angles of coarsened facets are also compared to theoretical predictions and available experimental data.

  • Neural mass modeling of PLI changes in EEG recordings of aging brains

     Pons Rivero, Antonio Javier; Cantero, José Luis; Atienza, Mercedes; Garcia Ojalvo, Jorge
    GABA Scientific Workshop
    Presentation's date: 2009-03-25
    Presentation of work at congresses

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  • Phase field study of three dimensional brittle fracture

     Pons Rivero, Antonio Javier; Karma, Alain
    Symposium on Phase-Field Modelling in Materials Science
    Presentation's date: 2009-08-31
    Presentation of work at congresses

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  • Relating structural and functional aberrant connectivity in aging brains via neural mass modeling

     Pons Rivero, Antonio Javier; Cantero, José Luis; Atienza, Mercedes; Garcia Ojalvo, Jorge
    International Workshop on Trends in Complex System: Synchronization and Multiscale Complex Dynamics in the Brain
    Presentation's date: 2009-11-03
    Presentation of work at congresses

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  • PROPIETATS DINÀMIQUES I NO LINIALS DE MATERIALS I SITEMES FOTÒNICS, ELÈCTRICS I BIOLÒGICS

     Belana Punseti, Juan; Nistor, Ioan Cristian; Masoller Alonso, Cristina; Domedel Puig, Nuria; Diego Vives, Jose Antonio; Cañadas Lorenzo, Juan Carlos; Mudarra Lopez, Miguel; Òrrit Prat, Jordi; Aragoneses Aguado, Andres; Trull, Jose; Staliunas, Kestutis; Herrero Simon, Ramon; Torrent Serra, Maria Del Carmen; Vilaseca Alavedra, Ramon; Font Garcia, Josep Lluís; Cojocaru, Crina Maria; Espinar Calvo, Maria Lorena; De Sancristobal Alonso, Belen; Pons Rivero, Antonio Javier; Sellarès González, Jordi; Tiana Alsina, Jordi; Zamora Munt, Jordi; Roppo, Vito; Garcia Ojalvo, Jorge
    Participation in a competitive project

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  • Modeling synchronization loss in Alzheimer¿s disease

     Pons Rivero, Antonio Javier; Garcia Ojalvo, Jorge; Cantero, José Luis; Atienza, Mercedes
    Synchronizability and Network Topology in Artificial and Natural Neural Networks
    Presentation's date: 2008-04-25
    Presentation of work at congresses

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  • Modeling synchronization loss in large-scale brain dynamics

     Pons Rivero, Antonio Javier; Cantero, Jose Luis; Atienza, Mercedes; Garcia Ojalvo, Jorge
    GABA Scientific Workshop
    Presentation's date: 2008-05-28
    Presentation of work at congresses

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  • Modeling synchronization loss in large-scale brain dynamics

     Pons Rivero, Antonio Javier; Cantero, J L; Atienza, M; Garcia Ojalvo, Jorge
    International Conference on Artificial Neural Networks 2008
    Presentation's date: 2008-09-06
    Presentation of work at congresses

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  • Nonlinear chemoconvection in the methylene-blue¿glucose system: Two-dimensional shallow layers

     Pons Rivero, Antonio Javier; Batiste Boleda, Oriol; Bees, M.A.
    Physical review E: statistical, nonlinear, and soft matter physics
    Date of publication: 2008-07-23
    Journal article

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  • Modeling synchronization loss in large-scale brain dynamics

     Pons Rivero, Antonio Javier; Cantero, José Luis; Atienza, Mercedes; Garcia Ojalvo, Jorge
    Lecture notes in computer science
    Date of publication: 2008-09-03
    Journal article

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  • Synchronization loss in large-scale brain dynamics

     Pons Rivero, Antonio Javier; Cantero, José Luis; Atienza, Mercedes; Garcia Ojalvo, Jorge
    Coherent Behavior in Neuronal Networks
    Presentation's date: 2007-10-18
    Presentation of work at congresses

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  • Synchronization loss in large-scale brain dynamics

     Pons Rivero, Antonio Javier; Cantero, José Luis; Atienza, Mercedes; Garcia Ojalvo, Jorge
    Noise in Life: Stochastic Dynamics in the Neurosciences
    Presentation's date: 2007-11-07
    Presentation of work at congresses

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  • GABA: Global Approach to Brain Activity (FP6-2005-NEST-Path-043309)

     Garcia Ojalvo, Jorge; Masoller Alonso, Cristina; Torrent Serra, Maria Del Carmen; Pons Rivero, Antonio Javier
    Participation in a competitive project

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  • Feedback control of unstable cellular solidification fronts

     Pons Rivero, Antonio Javier; Karma, Alain; Akamatsu, Silvère; Newey, Michael; Pomerance, Andrew; Singer, Herman; Losert, Wolfgang
    Physical review E, statistical physics, plasmas, fluids, and related interdisciplinary topics
    Date of publication: 2007-02-08
    Journal article

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  • Chemoconvection patterns in the methylene-blue-glucose system: weakly nonlinear analysis

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Bees, M.A.
    Physical review E, statistical physics, plasmas, fluids, and related interdisciplinary topics
    Date of publication: 2004-12-07
    Journal article

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  • Derivation of amplitude equations for a chemoconvection pattern-forming instability

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Bees, Martin
    International Workshop on Trends in Pattern Formation: from Amplitude Equations to Applications
    Presentation's date: 2003-10-15
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  • Patterns in the "Blue Bottle": experiments and theory

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Bees, Martin; Soerensen, Preben
    International Seminar on Trends in Pattern Formation: From Amplitude Equations to Applications
    Presentation's date: 2003-09-09
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  • Análisis cuantitativo de estructuras espacio-temporales quimioconvectivas

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Bees, Martin; Soerensen, Preben
    Congreso de Física Estadística
    Presentation's date: 2002-05-24
    Presentation of work at congresses

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  • Modelling a chemically driven hydrodynamic instability

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Soerensen, Preben; Bees, Martin
    Xarxa Temàtica en Dinàmiques no Lineals d'Autoorganització Espai-temporal
    Presentation's date: 2002-02-08
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  • Quantitative analysis of chemoconvection patterns

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Soerensen, Preben; Bees, Martin
    PHYSBIO Non-equilibrium in Physics and Biology
    Presentation's date: 2002-09-17
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  • Quantitative analysis of chemoconvection patterns in the methylene-blue-glucose system

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Bees, M.A.; Sorensen, Preben Grae
    Journal of physical chemistry B
    Date of publication: 2002-06-27
    Journal article

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  • Chemoconvection: a chemically induced hydrodynamic instability

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Soerensen, Preben; Bees, Martin
    Graduate School in Nonlinear Science
    Presentation's date: 2001-06-12
    Presentation of work at congresses

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  • Chemoconvection: A chemically driven hydrodynamic instability

     Bees, M.A.; Pons Rivero, Antonio Javier; Sorensen, Preben Grae; Sagués Mestre, Francesc
    Journal of chemical physics
    Date of publication: 2001
    Journal article

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  • Chemoconvection: an example of a pattern forming instability

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Soerensen, Preben; Bees, Martin
    Annual Meeting of the T. M. R. Network on Pattern, Noise and Chaos
    Presentation's date: 2000-09-01
    Presentation of work at congresses

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  • Pattern formation in the methylene-blue-glucose system

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Bees, M.A.; Sorensen, Preben Grae
    Journal of physical chemistry B
    Date of publication: 2000-02-18
    Journal article

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  • Patterns in the "blue-bottle experiment"

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Soerensen, Preben; Bees, Martin
    Annual Meeting of the T. M. R. Network on Pattern, Noise and Chaos
    Presentation's date: 1999-05-07
    Presentation of work at congresses

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  • Pattern formation in the Methylene-Blue-Glucose system

     Pons Rivero, Antonio Javier; Sagués Mestre, Francesc; Soerensen, Preben; Bees, Martin
    Ph. D. Summer School in Modelling Nonlinear Dynamics in Complex Chemical and Biological Systems
    Presentation's date: 1999-06-23
    Presentation of work at congresses

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