Jabbar Kadhim Al-Fatlawee, Ihsan. “On ParaLindelöf and semiparaLindelöf Spaces”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 2, no. 1, Sept. 2017, pp. 56-63, https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/212.