ALI, D. M.; AZAM, F. A. On Some R<sub>1</sub>-Properties in Fuzzy Topological Spaces. Journal of Scientific Research, [S. l.], v. 4, n. 1, p. 21, 2011. DOI: 10.3329/jsr.v4i1.7044. Disponível em: https://banglajol.info/index.php/JSR/article/view/7044. Acesso em: 17 may. 2022.