N. ANURADHA. \(r_o\)-operator in topological spaces. Malaya Journal of Matematik, India, v. 8, n. 03, p. 1237–1239, 2024. DOI: 10.26637/MJM0803/0089. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/1987. Acesso em: 16 jul. 2024.