RHOADES, B.E. A Fixed Point Theorem for Certain Operators. CUBO, A Mathematical Journal, [S. l.], v. 10, n. 4, p. 67–72, 2008. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1488. Acesso em: 3 nov. 2025.