@article{GDZPPN002042274,
title = {A structure theorem for sum form functional equations.},
journal = {Aequationes mathematicae},
volume = {53},
year = {1997},
pages = {141-154},
zbl = {0869.39008},
url = {http://dml.mathdoc.fr/item/GDZPPN002042274}
}
Losonczi, László. A structure theorem for sum form functional equations.. Aequationes mathematicae, Tome 53 (1997) pp. 141-154. http://gdmltest.u-ga.fr/item/GDZPPN002042274/