NHON, L. N. T. .; THINH, B. Q. . \(\pi gp\)-Normal Topological Spaces. Journal of Advanced Studies in Topology, [S. l.], v. 4, n. 1, p. 48–54, 2022. Disponível em: http://m-sciences.com/index.php/jast/article/view/101. Acesso em: 2 jun. 2023.