%0 Journal Article %A Janusz Krzyszkowski %T Necessary and sufficient conditions for generalized convexity %J Annales Polonici Mathematici %D 1995 %P 77-88 %V 61 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-61-1-77-88/ %R 10.4064/ap-61-1-77-88 %G en %F 10_4064_ap_61_1_77_88