%0 Journal Article
%A Ivanov, Milen
%A Zlateva, Nadia
%T Abstract Subdifferential Calculus and Semi-Convex Functions
%J Serdica Mathematical Journal
%D 1997
%P 35-58
%V 23
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SMJ2_1997_23_1_a3/
%G en
%F SMJ2_1997_23_1_a3