AHMEDA , A. .; AHMED OULD AHMED MAHMOUD, S. . Classes of Mappings in Metric Spaces. WAS Science Nature (WASSN) ISSN: 2766-7715, [S. l.], v. 2, n. 1, 2019. Disponível em: https://worldascience.com/journals/index.php/wassn/article/view/7. Acesso em: 18 apr. 2024.