%0 Journal Article %A V. V. Struzhanov %A K. V. Berdnikov %T On a stability of polar symmetrical deformation of~bodies from softening materials %J Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences %D 2014 %P 111-120 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VSGTU_2014_4_a9/ %G ru %F VSGTU_2014_4_a9