Trisna, Trisna, Marimin Marimin, Yandra Arkeman, and Titi Candra Sunarti. 2020. “Fuzzy Multi-Objective Optimization for Wheat Flour Supply Chain Considering Raw Material Substitution”. International Journal of Industrial Engineering and Management 11 (3):180-91. https://doi.org/10.24867/IJIEM-2020-3-263.