Abbas Abadi, D. A., and A. Abbas Fadel. “Evaluation of the Optimal Investment Portfolio for a Sample of Iraqi Private Commercial Banks for the Period 2016-2020”. Baghdad College of Economic Sciences University Journal (BCESUJ), vol. 67, no. 1, Jan. 2022, pp. 221-39, https://ojs.baghdadcollege.edu.iq/index.php/BCESUJ/article/view/114.