%0 Journal Article %A Janusz Matkowski %T On a ?-Wright convexity and the converse of Minkowsi's inequality. %J Aequationes mathematicae %D 1992 %P 106-112 %V 43 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1992__43_1_137448/ %F AM2_1992__43_1_137448