Hermiati, E., S. Tsubaki, and J.- ichi Azuma. “Cassava Pulp Hydrolysis under Microwave Irradiation With Oxalic Acid Catalyst for Ethanol Production”. Journal of Mathematical and Fundamental Sciences, vol. 46, no. 2, July 2014, pp. 125-39, doi:10.5614/j.math.fund.sci.2014.46.2.2.