K. BALAMURUGAN; M. ARUNKUMAR; P. RAVINDIRAN. Solution and stability of system of quartic functional equations. Malaya Journal of Matematik, India, v. 3, n. 03, p. 250–267, 2015. DOI: 10.26637/mjm303/004. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/474. Acesso em: 21 nov. 2024.