RASHID, N. O. .; HUSSEIN, S. A. . Maximal and Minimal Regular β -Open Sets in Topological Spaces. Iraqi Journal of Science, [S. l.], v. 63, n. 4, p. 1720–1728, 2022. DOI: 10.24996/ijs.2022.63.4.29. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/4629. Acesso em: 29 jun. 2022.