Roces, S. A., R. Tan, F. J. T. De Cruz, S. C. Gong, and R. K. Veracruz. “Methanolysis of Jatropha Oil Using Conventional Heating”. ASEAN Journal of Chemical Engineering, Vol. 11, no. 1, Dec. 2011, pp. 41-46, https://journal.ugm.ac.id/v3/AJChE/article/view/8085.