S. I. Mahmood, “On Weak Soft N-Open Sets and Weak Soft DN ~ - Sets in Soft Topological Spaces”, Al-Nahrain J. Sci., vol. 20, no. 2, pp. 131–141, Jun. 2017, Accessed: May 22, 2026. [Online]. Available: https://mail.anjs.edu.iq/index.php/anjs/article/view/94