Bashir, Abdul, K. M. Husni Thamrin, Muhammad Farhan, Mukhlis Mukhlis, and Dirta Pratama Atiyatna. 2019. “The Causality Between Human Capital, Energy Consumption, CO2 Emissions, and Economic Growth: Empirical Evidence from Indonesia”. International Journal of Energy Economics and Policy 9 (2):98-104. https://www.econjournals.com/index.php/ijeep/article/view/7377.