فهرس المقالات Mohammad Reza Tahaee Khosroshahi المقاله 1 - Determining and Ranking Efficiency of Various Product Grades Produced in Jam Polyethylene Plants using Fuzzy Data Envelopment Analysis Mehdi Abbasi Mohammad Reza Tahaee Khosroshahi International Journal of Data Envelopment Analysis , العدد 2 , السنة 12 , بهار 2024