List of Articles Open Access Article Abstract Page Full-Text 1 - Inverse Data Envelopment Analysis to Estimate Inputs with Triangular Fuzzy Numbers Mohammad Taghi Yahyapour-Shikhzahedi sohrab kordrostami S Edalatpanah Alireza Amirteimoori Open Access Article Abstract Page Full-Text 2 - Ranking extreme and non-extreme efficient DMUs on the basis of MPSS in DEA Javad Gerami Javad Vakili Open Access Article Abstract Page Full-Text 3 - Outputs Estimation and Efficiency Improvement of Two-Stage Network Systems Zahra Shiri Daryani Sahbnam Rzavyan Open Access Article Abstract Page Full-Text 4 - Determining and Ranking Efficiency of Various Product Grades Produced in Jam Polyethylene Plants using Fuzzy Data Envelopment Analysis Mehdi Abbasi Mohammad Reza Tahaee Khosroshahi