@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/