A. Nawkhass, Maher, and Nejmaddin A. Sulaiman. “Solving of the Quadratic Fractional Programming Problems by a Modified Symmetric Fuzzy Approach”. Ibn AL-Haitham Journal For Pure and Applied Sciences 35, no. 4 (October 20, 2022): 241–245. Accessed April 30, 2025. https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/2858.