@article{05282505, title = {Hyers-Ulam-Rassias and Ulam-Gavruta-Rassias stabilities of an additive functional equation in several variables.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2007}, year = {2007}, doi = {10.1155/2007/13437}, zbl = {1148.39027}, language = {en}, url = {http://dml.mathdoc.fr/item/05282505} }
Nakmahachalasint, Paisan. Hyers-Ulam-Rassias and Ulam-Gavruta-Rassias stabilities of an additive functional equation in several variables.. International Journal of Mathematics and Mathematical Sciences, Tome 2007 (2007) . doi : 10.1155/2007/13437. http://gdmltest.u-ga.fr/item/05282505/