Keshavarz, Esmaiel, Ali Mahmoodirad, and Sadegh Niroomand. “A Transportation Problem Considering Fixed Charge and Fuzzy Shipping Costs ”. Decision Making Advances 1, no. 1 (August 23, 2023): 115–122. Accessed August 9, 2026. http://www.dma-journal.org/index.php/dema/article/view/13.