M. ARUNKUMAR; C. DEVI SHYAMALA MARY. Generalized Hyers - Ulam Stability of Additive - Quadratic - Cubic - Quartic Functional Equation in Fuzzy Normed Spaces: A Direct Method. International Journal of Mathematics And its Applications, [S. l.], v. 4, n. 4 (Special Issue), p. 1–16, 2016. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/1416. Acesso em: 11 may. 2024.