Mohammed, Arkan J. “Weak Forms of L (θ-Generalized Closed) - Spaces الاصدار:”. Al-Nahrain Journal of Science 15, no. 2 (June 1, 2012): 132–136. Accessed May 22, 2026. https://mail.anjs.edu.iq/index.php/anjs/article/view/1076.