رضا صباح منفي, and عبد الامير رقية ياسر. “Evoluation of Service System in the General Eduction Baghdad Hospital Using Q GERT”. Journal of Economics and Administrative Sciences 19, no. 74 (December 1, 2013): 311. Accessed April 16, 2025. https://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/1454.