RAJASEKARAN, I.; RAVI, O. .; KANNA, S. S.; PARANJOTHI, M. New Generalized Classes of tau-omega. European Journal of Pure and Applied Mathematics, [S. l.], v. 9, n. 2, p. 152–164, 2016. Disponível em: https://ejpam.com/index.php/ejpam/article/view/2494. Acesso em: 13 aug. 2022.