Tareen, Afrasiab Khan, Noppawan Danbamrongtrakool, Imrana Niaz Sultan, Nicom Laemsak, Sarote Sirisansaneeyakul, Wirat Vanichsriratana, and Pramuk Parakulsuksatid. 2021. “Utilization of urea as a nitrogen source for ethanol production from oil palm trunk using simultaneous saccharification and fermentation”. Agriculture and Natural Resources 55 (3). Bangkok, Thailand:448–455. https://li01.tci-thaijo.org/index.php/anres/article/view/251801.