W. ASKANDAR, S.; S. ABDULLAH, B.; N. BALO, R. hα-Open Sets in Topological Spaces. Journal of Education and Science, [S. l.], v. 31, n. 3, p. 91–98, 2022. DOI: 10.33899/edusj.2022.134241.1251. Disponível em: https://edusj.uomosul.edu.iq/index.php/edusj/article/view/41527. Acesso em: 10 sep. 2025.