IBRAHIM, H. Z. . $$\delta^{*}$$-open sets and relation between some weak and strong forms of $$\delta^{*}$$-open sets in topological spaces. Journal of Advanced Studies in Topology, [S. l.], v. 6, n. 1, p. 20–27, 2022. Disponível em: http://www.m-sciences.com/index.php/jast/article/view/169. Acesso em: 5 oct. 2022.