@article{GDZPPN002036908, title = {A functioanl identity characterizing polynomials.}, journal = {Aequationes mathematicae}, volume = {33}, year = {1987}, pages = {147-152}, zbl = {0633.39005}, url = {http://dml.mathdoc.fr/item/GDZPPN002036908} }
Cross, G.E.; Kannappan, Pl. A functioanl identity characterizing polynomials.. Aequationes mathematicae, Tome 33 (1987) pp. 147-152. http://gdmltest.u-ga.fr/item/GDZPPN002036908/