@article{GDZPPN002037831, title = {A functional equation of Ih-Ching Hsu.}, journal = {Aequationes mathematicae}, volume = {38}, year = {1989}, pages = {146-154}, zbl = {0687.39007}, url = {http://dml.mathdoc.fr/item/GDZPPN002037831} }
Lew, John S. A functional equation of Ih-Ching Hsu.. Aequationes mathematicae, Tome 38 (1989) pp. 146-154. http://gdmltest.u-ga.fr/item/GDZPPN002037831/