جلوب خالد زغيتون. “Efficiency Measurement Model for Postgraduate Programs and Undergraduate Programs by Using Data Envelopment Analysis”. Journal of Economics and Administrative Sciences 20, no. 78 (August 1, 2014): 1. Accessed December 24, 2024. https://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/775.