Closed Extension Topological Spaces. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 15, n. 2, p. 672–680, 2022. DOI: 10.29020/nybg.ejpam.v15i2.4379. Disponível em: https://ejpam.com/index.php/ejpam/article/view/4379.. Acesso em: 2 may. 2024.