Hadi I, H. Al Kanani I. Generalized Heptagonal Membership Function for Fully Fuzzy Linear Fractional Programming Problems. IHJPAS [Internet]. 2025 Apr. 20 [cited 2025 May 1];38(1):417-2. Available from: https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/3596