@article{GDZPPN002035219,
title = {On a sum form functional equation.},
journal = {Aequationes mathematicae},
volume = {28},
year = {1985},
pages = {321-326},
zbl = {0576.39010},
url = {http://dml.mathdoc.fr/item/GDZPPN002035219}
}
Sander, Wolfgang. On a sum form functional equation.. Aequationes mathematicae, Tome 28 (1985) pp. 321-326. http://gdmltest.u-ga.fr/item/GDZPPN002035219/