@article{M2AN_1990__24_1_103_0,
     author = {Quintela-Estevez, P.},
     title = {Critical points in the energy of hyperelastic materials},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {103--132},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {24},
     number = {1},
     year = {1990},
     mrnumber = {1034901},
     zbl = {0692.73015},
     language = {en},
     url = {http://archive.numdam.org/item/M2AN_1990__24_1_103_0/}
}