%0 Journal Article
%A V. A. Startsev
%T Symmetric continuity and symmetric differentiability with respect to sets
%J Doklady Akademii Nauk
%D 1969
%P 1251-1253
%V 185
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_185_6_a12/
%G ru
%F DAN_1969_185_6_a12