Purwanto, S. K., Obsatar Sinaga, and Morni Hayati Jaafar Sidik. 2020. “Ensuring Renewable Energy Consumption through Innovation, R&D and Energy Import in Indonesia: A Time Series Analysis”. International Journal of Energy Economics and Policy 11 (1):577-83. https://econjournals.org.tr/index.php/ijeep/article/view/10715.