In this paper using classical inequalities and Cardan-Viète formulae some inequalities involving zeroes and coefficients of hyperbolic polynomials are given. Furthermore, considering real polynomials whose zeros lie in Re(z)>0, the previous results have been extended and new inequalities are obtained.
Rubió-Massegú, J.; Diaz-Barrero, J.L.; Rubio, P. Zero and coefficient inequalities for hyperbolic polynomials. "Journal of inequalities in pure and applied mathematics", Març 2006, vol. 7, núm. 1, p. 1-6.