Naser Majeed, Rasha. “Compactness on Bitopological Spaces”. Journal of Al-Qadisiyah for Computer Science and Mathematics 3, no. 1 (September 17, 2017): 130–136. Accessed February 17, 2026. https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/245.