Muhammed, Musa, Suleiman Saad, Yusuf Isah Maikudi, and Ali Baba Usman. “Dynamic Effects of Energy Consumption and Economic Growth on CO2 Emission: Testing EKC Hypothesis in Africa ”. European Scientific Journal, ESJ 19, no. 28 (October 31, 2023): 127. Accessed November 25, 2024. https://eujournal.org/index.php/esj/article/view/17384.