“Evaluating the Efficiency of Sustainable Suppliers Based on Human and Environmental Indicators Using Data Envelopment Analysis and Gap Analysis (Case Study: Petrochemical Companies)”. Management Strategies and Engineering Sciences 6, no. 2 (September 10, 2024): 134–143. Accessed November 24, 2024. https://msesj.com/index.php/mses/article/view/85.