Karamad S, Dehghan Dehnavi H, Babaei Meybodi H, Rabbani M. Evaluating the Efficiency of Sustainable Suppliers Based on Human and Environmental Indicators Using Data Envelopment Analysis and Gap Analysis (Case Study: Petrochemical Companies). MSES. 2024;6(2):134-143. doi:10.61838/msesj.6.2.14