%0 Journal Article %A V. Yu. Salamatova %A Yu. V. Vassilevskii %T On ellipticity of hyperelastic models based on experimental data %J Contemporary Mathematics. Fundamental Directions %D 2017 %P 504-515 %V 63 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2017_63_3_a7/ %G ru %F CMFD_2017_63_3_a7