@article{05313172, title = {On the stability of quadratic functional equations.}, journal = {Abstract and Applied Analysis}, volume = {2008}, year = {2008}, doi = {10.1155/2008/628178}, zbl = {1146.39045}, language = {en}, url = {http://dml.mathdoc.fr/item/05313172} }
Lee, Jung Rye; An, Jong Su; Park, Choonkil. On the stability of quadratic functional equations.. Abstract and Applied Analysis, Tome 2008 (2008) . doi : 10.1155/2008/628178. http://gdmltest.u-ga.fr/item/05313172/