. K. Jassim, Saheb, and Haider .G. Ali. “When Compact Sets Are G-Closed”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 3, no. 2, Oct. 2017, pp. 99-109, https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/280.