Asri, N. P., Budikarjono, K., Suprapto, S., & Roesyadi, A. (2015). Kinetics of Palm Oil Transesterification Using Double Promoted Catalyst CaO/KI/γ- Al2O3. Journal of Engineering and Technological Sciences, 47(4), 353-363. https://doi.org/10.5614/j.eng.technol.sci.2015.47.4.1