Team, Support. “On Generalized Stability of an N-Dimensional Quadratic Functional Equation: Tippaporn Eungrasamee, Patanee Udomkavanich, Paisan Nakmahachalasint”. Thai Journal of Mathematics 8, no. 4 (December 31, 2010): 43–50. Accessed May 3, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/234.