List of Articles واحدهای تصمیم گیرنده Open Access Article Abstract Page Full-Text 1 - An enhanced Russell model to measure aggregate efficiency of multi-period production systems Mohammad Najari Alamouti Mohsen Khounsiavash Reza Kazimi Matin Zohreh Moghaddas Open Access Article Abstract Page Full-Text 2 - Development of a Network Data Envelopment Analysis (NDEA) model for investigation of the internal structure of decision-making units Reza Soleymani-Damaneh