Muhamad, S. A. W., J. Gimbun, C. K. Cheng, and S. Nurdin. “Enhancement of Biodiesel Yield from High FFA Malaysian Rubber Seed Oil With Sodium Methoxide Treated Limestone”. Journal of Engineering and Technology (JET) 4, no. 1 (June 30, 2013): 123–132. Accessed May 18, 2024. https://jet.utem.edu.my/jet/article/view/186.