%0 Journal Article
%A János Aczél
%A Marek Kuczma
%T On two mean value properties and functional equations associated with them.
%J Aequationes mathematicae
%D 1989
%P 216-235
%V 38
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1989__38_1_137329/
%F AM2_1989__38_1_137329