TY  - JOUR
AU  - A. Lundberg
TI  - On the functional equation f(...(x) + g(y)) = ..(x) * h(x+y). (Short Communication).
JO  - Aequationes mathematicae
PY  - 1977
SP  - 309
EP  - 310
VL  - 15
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1977__15_136666/
ID  - AM2_1977__15_136666
ER  -