Setiyo, Muji, Sudjito Soeparman, Nurkholis Hamidi, and Slamet Wahyudi. “Techno-Economic Analysis of Liquid Petroleum Gas Fueled Vehicles As Public Transportation in Indonesia”. International Journal of Energy Economics and Policy 6, no. 3 (July 22, 2016): 495–500. Accessed April 25, 2024. https://www.econjournals.com/index.php/ijeep/article/view/2422.