Susanto, H., dan A. A. Syamsuriputra. Utilization of Sugars in Hydrolysate from Oil Palm Empty Fruit Bunches for Ethanol Fermentation Using Pichiastipitis CBS 5773. Vol. 4, no. 2, Desember 2004, hlm. 40-47, https://journal.ugm.ac.id/v3/AJChE/article/view/7622.