Nazaruddin Sinaga; Syukran Bestari Nasution; Maizirwan Mel. Process Optimization of Biogas Production from Palm Oil Mill Effluent: A Case Study of a Crude Palm Oil Factory in Muaro Jambi, Indonesia. J. Adv. Res. Fluid Mech. Therm. Sc. 2018, 49, 155-169.