Davoudi, Niloofar, Farhad Hamidi, and Hasan Mishmast Nehi. “A A Method for Solving Interval Type-2 Triangular Fuzzy Bilevel Linear Programming Problem”. Yugoslav Journal of Operations Research 33, no. 1 (November 20, 2022): 71–90. Accessed July 30, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/725.