%0 Journal Article %A Marek Kuczma %A Bogdan Choczewski %T On a system of functional equations. %J Aequationes mathematicae %D 1985 %P 262-268 %V 28 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1985__28_137065/ %F AM2_1985__28_137065