Waheed, Abdul, and Najia Saqib. “Performance and Potential of Central Government Revenue: A Panel Data Analysis for Oil Exporting and Importing Countries”. International Journal of Energy Economics and Policy 10, no. 1 (November 13, 2019): 249–254. Accessed April 25, 2024. https://www.econjournals.com/index.php/ijeep/article/view/8819.