TY  - JOUR
AU  - HALINA SWIATAK
TI  - A Proof of theEquivalence of the Equation f(x+y-xy)+f(xy) = f(x) + (y) and Jensen's Functional Equa tion
JO  - Aequationes mathematicae
PY  - 1971
SP  - 24
EP  - 29
VL  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1971__6_136163/
ID  - AM2_1971__6_136163
ER  -