KHALAF, A. B. .; AHMED, N. K. \(S_\beta\)-paracompact Spaces. Journal of Advanced Studies in Topology, [S. l.], v. 4, n. 1, p. 40–47, 2022. Disponível em: http://www.m-sciences.com/index.php/jast/article/view/100. Acesso em: 5 oct. 2022.