@article{GDZPPN002035138, title = {On a generalization of sum form functional equation - V.}, journal = {Aequationes mathematicae}, volume = {28}, year = {1985}, pages = {255-261}, zbl = {0571.39006}, url = {http://dml.mathdoc.fr/item/GDZPPN002035138} }
Kannappan, Pl. On a generalization of sum form functional equation - V.. Aequationes mathematicae, Tome 28 (1985) pp. 255-261. http://gdmltest.u-ga.fr/item/GDZPPN002035138/