Yuaningsih, Lilis, R. Adjeng Mariana Febrianti, and Hafiz Waqas Kamran. “Reducing CO2 Emissions through Biogas, Wind and Solar Energy Production: Evidence from Indonesia”. International Journal of Energy Economics and Policy 10, no. 6 (October 10, 2020): 684–689. Accessed May 8, 2024. https://www.econjournals.com/index.php/ijeep/article/view/10590.