Budiyanto, M. A., A. S. Pamitran, and T. Yusman. “Optimization of the Route of Distribution of LNG Using Small Scale LNG Carrier: A Case Study of a Gas Power Plant in the Sumatra Region, Indonesia”. International Journal of Energy Economics and Policy, vol. 9, no. 6, Oct. 2019, pp. 179-87, https://econjournals.com/index.php/ijeep/article/view/8103.