%0 Journal Article
%A Kazimierz Nikodem
%T On midpoint convex set-valued functions.
%J Aequationes mathematicae
%D 1987
%P 46-56
%V 33
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1987__33_137201/
%F AM2_1987__33_137201