ESKANDANI, G. Z.; RASSIAS, J. M. Approximation of general α-cubic functional equations in 2-Banach spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 68, n. 10, p. 1430–1436, 2016. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1930. Acesso em: 5 dec. 2025.