Kurniawati, Dini. “Effect of Alkaline Metal Catalyst to Transesterification of Jatropha Curcas Oil”. Journal of Energy, Mechanical, Material, and Manufacturing Engineering 3, no. 1 (June 30, 2018): 31–42. Accessed July 6, 2024. https://ejournal.umm.ac.id/index.php/JEMMME/article/view/5880.