DR V V S RAMACHANDRAM. On New Closed Sets in Grill Topological Spaces. Global Journal of Science Frontier Research, [S. l.], v. 22, n. F5, p. 39–43, 2023. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/102580. Acesso em: 24 apr. 2024.