TY - JOUR AU - Lundberg, A. TI - On the functional equation f(...(x) + g(y)) = ..(x) * h(x+y). (Short Communication). JO - Aequationes mathematicae PY - 1977 VL - 15 SP - 309 EP - 310 KW - generalized distributivity equation UR - http://eudml.org/doc/136666 ER -