Ardiyati, T., N. P. Dugos, S. A. Roces, M. Suzuki, and K. Kusnanto. “Stability and Emission Characteristics of Diesel-Ethanol-Coconut Methyl Ester Blends for the Diesel Engines”. ASEAN Journal of Chemical Engineering, Vol. 14, no. 1, Dec. 2014, pp. 1-11, https://journal.ugm.ac.id/v3/AJChE/article/view/8473.