@ARTICLE{27757632, author = {Yago, D. and Cante, J.C. and Lloberas-Valls, O. and Oliver, J.} , journal = {Computational mechanics} , year = {2020} , month = {Aug} , volume = {66} , number = {2} , pages = {259--286} , doi = {10.1007/s00466-020-01850-0} , url = {http://hdl.handle.net/2117/191284; https://link.springer.com/article/10.1007/s00466-020-01850-0} , title = {Topology optimization of thermal problems in a nonsmooth variational setting: closed-form optimality criteria} }