Waly Freh, Daher, and Alia Shany Hassan. “Generalized Sum of Fuzzy Subgroup and α-Cut Subgroup”. Journal of Al-Qadisiyah for Computer Science and Mathematics 1, no. 1 (August 29, 2017): 130–135. Accessed November 15, 2024. https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/176.