@article{GDZPPN002030624,
title = {On a functional equation which occurs in a characterization problem.},
journal = {Aequationes mathematicae},
volume = {15},
year = {1977},
pages = {259-274},
zbl = {0382.60018},
url = {http://dml.mathdoc.fr/item/GDZPPN002030624}
}
Laha, R.G.; Lukacs, E. On a functional equation which occurs in a characterization problem.. Aequationes mathematicae, Tome 15 (1977) pp. 259-274. http://gdmltest.u-ga.fr/item/GDZPPN002030624/