FAKHAR, M.; ZAFARANI, J. A New Version of Fan‘s Theorem and its Applications. CUBO, A Mathematical Journal, [S. l.], v. 10, n. 4, p. 137–147, 2008. Disponível em: https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1494. Acesso em: 20 apr. 2024.