فهرس المقالات two-stage production network حرية الوصول المقاله صفحة الملخص نص كامل 1 - Developing a Two-Stage Network Data Envelopment Analysis Model with Desirable and Undesirable Outputs (Case Study of Butter Manufacturing Industry) A. Shirvani A. Azizi 10.30495/ijim.2022.65237.1568