KOHL, J. K.; VASHISTHA, S. A Common Fixed Point Theorem in Metric Spaces. The Journal of the Indian Mathematical Society, [S. l.], v. 72, n. 1-4, p. 107–114, 2005. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/21822. Acesso em: 28 apr. 2024.