Senyigit, Ercan, Ismet Soylemez, and Ugur Atici. “Long-Term Supplier Selection Problem: A Case Study”. New Trends and Issues Proceedings on Humanities and Social Sciences 3, no. 4 (March 22, 2017): 182–189. Accessed November 24, 2024. https://un-pub.eu/ojs/index.php/pntsbs/article/view/1612.