Team S. A quartic functional equation and its generalized Hyers-Ulam-Rassias stability: Montakarn Petapirak, Paisan Nakmahachalasint. Thai J Math [Internet]. 2008 Dec. 31 [cited 2024 Apr. 28];6(3):77-84. Available from: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/136