List of Articles improving cost efficiency Open Access Article Abstract Page Full-Text 1 - Goal programming model and inverse data envelopment analysis for estimating inputs Mohammad Taghi Yahyapour Shikhzahedi Alireza Amir Timuri S. Kordrostami Seyyed Ahmad Edalatpanah Open Access Article Abstract Page Full-Text 2 - Inverse Data Envelopment Analysis to Estimate Inputs with Triangular Fuzzy Numbers Mohammad Taghi Yahyapour-Shikhzahedi sohrab kordrostami S Edalatpanah Alireza Amirteimoori