A. I. Nasir and R. B. Esmaeel, “N-C-Compactness”, Al-Nahrain J. Sci., vol. 14, no. 3, pp. 129–134, Jul. 2018, Accessed: May 22, 2026. [Online]. Available: https://mail.anjs.edu.iq/index.php/anjs/article/view/843