ABDULRAHMAN, R. J.; RASHID, K. N. Crude Oil Price Fluctuations and their Impact on the Internal Gap of Selected OPEC Countries (1990 - 2014). Academic Journal of Nawroz University, [S. l.], v. 8, n. 1, p. 372–388, 2019. DOI: 10.25007/ajnu.v8n1a329. Disponível em: https://journals.nawroz.edu.krd/index.php/ajnu/article/view/329. Acesso em: 23 apr. 2024.