Aslam, Neelufer, and Swati Shastri. “Relationship Between Oil Revenues and Gross Domestic Product of Oman: An Empirical Investigation”. International Journal of Economics and Financial Issues, vol. 9, no. 6, Nov. 2019, pp. 195-01, https://econjournals.com./index.php/ijefi/article/view/8805.