%0 Journal Article
%A Yu. E. Linke
%T The problem of the existence of a subdifferential for continuous
%J Doklady Akademii Nauk
%D 1990
%P 784-787
%V 315
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1990_315_4_a2/
%G ru
%F DAN_1990_315_4_a2