%0 Journal Article
%A V. P. Soltan
%A V. D. Chepoi
%T Some classes of d-convex functions in a graph
%J Doklady Akademii Nauk
%D 1983
%P 1314-1317
%V 273
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1983_273_6_a7/
%G ru
%F DAN_1983_273_6_a7