List of Articles maryam khodadadi Article 1 - Allocation models for DMUs with negative data Ghasem Tohidi Maryam Khodadadi Journal of Industrial Engineering International , Issue 5 , Year , Winter 2013 Article 2 - IMPROVING THE SELECTION SYMMETRIC WEIGHTS AS A SECONDARY GOAL IN DEA CROSS-EFFICIENCY EVALUATION Ghasem Tohidi Maryam Khodadadi Elham Rostamiyan International Journal of Mathematical Modeling & Computations , Issue 1 , Year , Spring 2013