Abdulrahman, Rijuwan J., and Khame N. Rashid. “Crude Oil Price Fluctuations and Their Impact on the Internal Gap of Selected OPEC Countries (1990 - 2014)”. Academic Journal of Nawroz University 8, no. 1 (March 31, 2019): 372–388. Accessed April 19, 2024. https://journals.nawroz.edu.krd/index.php/ajnu/article/view/329.