OTHMAN, H. A. .; SIBIH, A. M. . Weak and strong forms of fuzzy $$\alpha$$-open (closed) sets and its applications. Journal of Advanced Studies in Topology, [S. l.], v. 9, n. 2, p. 100–112, 2022. Disponível em: http://m-sciences.com/index.php/jast/article/view/248. Acesso em: 26 jan. 2023.