Murthy, S., M. Arunkumar, and V. Govindan. “General Solution and Generalized Ulam-Hyers Stability of a Generalized N- Type Additive Quadratic Functional Equation in Banach Space and Banach Algebra: Direct and Fixed Point Methods”. International Journal of Advanced Mathematical Sciences 3, no. 1 (May 19, 2015): 25–64. Accessed November 24, 2024. https://sciencepubco.com/index.php/IJAMS/article/view/4402.