NOUH, A. A.; EL-SHAFEI, M. E. $ S$-Cluster Sets in Fuzzy Topological Spaces. Tamkang Journal of Mathematics, [S. l.], v. 33, n. 3, p. 233–240, 2002. DOI: 10.5556/j.tkjm.33.2002.233-240. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/325. Acesso em: 29 apr. 2024.