Samadi-Parviznejad, Paria, and Meysam Amini. “Optimizing The Transportation of Petroleum Products in A Possible Multi-Level Supply Chain”. International Journal of Innovation in Engineering 2, no. 3 (July 4, 2022): 67–83. Accessed May 20, 2024. https://ijie.ir/index.php/ijie/article/view/86.