Askandar, Sabih, Beyda S. Abdullah, and Luma Khaleel. “Soft I-Open Sets in Soft Bi-Topological Spaces”. Al-Qadisiyah Journal of Pure Science 27, no. 1 (January 21, 2023): 124-136. Accessed May 1, 2024. https://journalsc.qu.edu.iq/index.php/JOPS/article/view/1592.