%0 Journal Article %A V. P. Soltan %T On an extension of the concept of $H$-convexity %J Doklady Akademii Nauk %D 1981 %P 1059-1062 %V 258 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_258_5_a8/ %G ru %F DAN_1981_258_5_a8