ABO-SINNA, MAHMOUD A, and Azza H Amer. “An Interactive Dynamic Fuzzy Goal Programming for Bi-Level Multiobjective Linear Fractional Programming Problems”. JOURNAL OF ADVANCES IN MATHEMATICS 12, no. 12 (February 28, 2017): 6991–7007. Accessed May 8, 2024. https://rajpub.com/index.php/jam/article/view/3720.