List of Articles اندازهی کارآیی مبتنی بر متغیرهای کمکی (SBM) Open Access Article Abstract Page Full-Text 1 - Determining the Russell Technical Efficiency of measure in the Presence of Flexible Factors based on slack variables Majid Sedighi Hassan Kiyadeh Saber Saati Mohtadi Sohrab Kordrostami