%0 Journal Article
%A HALINA SWIATAK
%T A Proof of theEquivalence of the Equation f(x+y-xy)+f(xy) = f(x) + (y) and Jensen's Functional Equa tion
%J Aequationes mathematicae
%D 1971
%P 24-29
%V 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1971__6_136163/
%F AM2_1971__6_136163