Irwan, I., and L. Agus Salim. “Bioethanol From Oil Palm Empty Fruit Bunch (OPEFB): A Review Pretreatment and Enzymatic Hydrolysis”. International Journal of Transdisciplinary Knowledge, vol. 2, no. 2, Dec. 2021, pp. 1-14, doi:10.31332/ijtk.v2i2.18.