Pyae, H. A., N. Boontian, U. Yingchon, and C. Piasai. “Effect of Acid-Alkaline and Thermal Pre-Treatment to Cassava Pulp Feed for Batch Reactors in Optimization of Bio-Methane Yield”. Applied Environmental Research, vol. 40, no. 2, May 2018, pp. 51-60, doi:10.35762/AER.2018.40.2.5.