Setiyo, Muji, Sudjito Soeparman, Nurkholis Hamidi, and Slamet Wahyudi. 2016. “Techno-Economic Analysis of Liquid Petroleum Gas Fueled Vehicles As Public Transportation in Indonesia”. International Journal of Energy Economics and Policy 6 (3):495-500. https://mail.econjournals.com/index.php/ijeep/article/view/2422.