Yang, Shu, Elyas Abdulahi, Muhammad Afaq Haider, and Muhammed Asif Khan. 2019. “Revisiting the Curse: Resource Rent and Economic Growth of Sub-Sahara African Countries”. International Journal of Economics and Financial Issues 9 (1):121-30. https://www.econjournals.com/index.php/ijefi/article/view/7177.