TY  - JOUR
AU  - A. Lundberg
TI  - On the functional equation f(...(x) + g(y)) = ...(x) * h(x+y).
JO  - Aequationes mathematicae
PY  - 1977
SP  - 21
EP  - 30
VL  - 16
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1977__16_136671/
ID  - AM2_1977__16_136671
ER  -