Paryono, P., A. Absori, K. Dimyati, M. Basri, and S. D. Rismawati. “Liberalization and Electricity Policy Changes: Problems and Challenges in the Electricity Sector in Indonesia”. International Journal of Energy Economics and Policy, vol. 10, no. 1, Nov. 2019, pp. 170-7, https://www.econjournals.com/index.php/ijeep/article/view/8636.