BANSAL, Sonu. Stability of Quadratic Functional Equation. International Journal for Research Publication and Seminar, [S. l.], v. 4, n. 1, p. 4–6, 2013. Disponível em: https://jrps.shodhsagar.com/index.php/j/article/view/12. Acesso em: 8 apr. 2025.