Siwarasak, Pongsri, Pradabrat Pajankate, and Somporn Pleanjai. 2016. “Cellulase, mannanase and xylanase as novelty mixed enzyme RT-P3 powder through solid-state fermentation from copra meal residue for fed-batch ethanol fermentation”. Journal of Applied Research on Science and Technology (JARST) 15 (2):27-37. https://ph01.tci-thaijo.org/index.php/rmutt-journal/article/view/117764.