H. GOWRI, O. RAVI. Properties of W????˜-Closed Sets in Topological Spaces. Mathematical Statistician and Engineering Applications, [S. l.], v. 70, n. 2, p. 1556–1561, 2021. DOI: 10.17762/msea.v70i2.2479. Disponível em: https://www.philstat.org/index.php/MSEA/article/view/2479. Acesso em: 13 may. 2024.