N. GAYATHRI. $g^{\ast}s^{\ast}$ - Closed Sets in Topological Spaces. International Journal of Mathematics And its Applications, [S. l.], v. 4, n. 2 - C, p. 111–119, 2016. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1052. Acesso em: 22 jul. 2024.