Ahmad, Younis A., and Mardin M. Faraj. “Measuring the Impact of Private Investment on GDP in the Kurdistan Region for the Period (2006-2016): An Analytical Standard Study”. Academic Journal of Nawroz University 9, no. 4 (January 27, 2021): 397–410. Accessed April 26, 2024. https://journals.nawroz.edu.krd/index.php/ajnu/article/view/1032.