%0 Journal Article
%A S. I. Dudov
%T Subdifferentiability and superdifferentiability of distance functions
%J Matematičeskie zametki
%D 1997
%P 530-542
%V 61
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1997_61_4_a4/
%G ru
%F MZM_1997_61_4_a4