S. I. Mahmood, “Weak Forms of Fuzzy N- Open Sets and Fuzzy - Sets in Fuzzy Topological Spaces”, Iraqi Journal of Science, vol. 58, no. 4C, pp. 2401–2411, Jan. 2018, Accessed: Jun. 02, 2026. [Online]. Available: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/109