Abdulameer Kadhim, Dhuha. “On Soft 2-Inner Product Spaces”. Journal of Al-Qadisiyah for Computer Science and Mathematics 6, no. 2 (August 14, 2017): 157–168. Accessed April 3, 2025. https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/115.