%0 Journal Article %A Kazimierz Nikodem %T Midpoint convex functions majorized by midpoint concave functions. %J Aequationes mathematicae %D 1987 %P 45-51 %V 32 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1987__32_137175/ %F AM2_1987__32_137175