AHMAD, M. A Note on Functional Equations. The Journal of the Indian Mathematical Society, [S. l.], v. 35, n. 1-4, p. 263–268, 1971. DOI: 10.18311/jims/1971/16737. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/16737. Acesso em: 18 jul. 2024.