%0 Journal Article %A Quintela-Estevez, P. %T Critical points in the energy of hyperelastic materials %J ESAIM: Mathematical Modelling and Numerical Analysis %D 1990 %P 103-132 %V 24 %N 1 %I AFCET - Gauthier-Villars %C Paris %U http://geodesic.mathdoc.fr/item/M2AN_1990__24_1_103_0/ %G en %F M2AN_1990__24_1_103_0