“Non-Linear Interval-Valued Intuitionistic Fuzzy Number (IVIFN) Approach for an EPQ Model With Optimal Investment in Defective Items Considering Learning Effects”. Engineering Review 44, no. 4 (December 23, 2024): 160–182. Accessed November 5, 2025. https://www.engineeringreview.org/index.php/ER/article/view/2563.