@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/