%0 Journal Article
%A G. A. Seregin
%T Differential properties of extremals of variational problems in the mechanics of viscoplastic media
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1990
%P 117-124
%V 188
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1990_188_a5/
%G ru
%F TM_1990_188_a5