List of Articles Sepideh Vatani Article 1 - Evaluating Efficiency by Multiplier Method in Two-Stage Unit with Undesirable Outputs 10.30495/ijdea.2022.68506.1168 Sepideh Vatani International Journal of Data Envelopment Analysis , Issue 1 , Year , Winter 2022 Article 2 - Evaluation of efficiency using the product method in two-stage systems with undesirable outputs 10.30495/ijdea.2022.68507.1169 Sepideh Vatani International Journal of Data Envelopment Analysis , Issue 2 , Year , Spring 2021
