JOHN M. RASSIAS; M. ARUNKUMAR; P. AGILAN. Solution and Ulam - Hyers Stability of an Additive - Quadratic Functional Equation in Banach Space: Hyers Direct and Fixed Point Methods. International Journal of Mathematics And its Applications, [S. l.], v. 3, n. 4 - D, p. 17–46, 2015. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/512. Acesso em: 12 may. 2024.