AZIZ HUSSAIN AL-ABDULLA, Raad; KADHIM GABER, Sema. bopen Sets In Topological Spaces. Journal of Al-Qadisiyah for Computer Science and Mathematics, [S. l.], v. 2, n. 2, p. 77–88, 2017. Disponível em: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/225. Acesso em: 20 sep. 2024.