Awoyemi, Olanike Bosede, and Divine Amarachi Nwibe. “A Causal Assessment of Nigeria’s Crude Oil Revenue, Health Expenditure, and Economic Growth”. International Journal of Energy Economics and Policy 12, no. 5 (September 27, 2022): 420–424. Accessed November 23, 2024. https://econjournals.com./index.php/ijeep/article/view/13318.