Purwanto, S. K., and Obsatar Sinaga. “Exploring the Relationship Between Fossil Fuel Energy Consumption, Renewable Energy Consumption and Human Capital Index: A Study From Thailand”. International Journal of Energy Economics and Policy, vol. 11, no. 6, Nov. 2021, pp. 106-13, https://econjournals.com/index.php/ijeep/article/view/10910.