Davarnejad, R, K.M. Kassim, A Zainal, and Suhairi A. Sata. 2007. “Phase Equilibrium Study in Supercritical Fluid Extraction of Ethanol to Octane Mixture Using CO2”. ASEAN Journal of Chemical Engineering 7 (2), 137-40. https://journal.ugm.ac.id/v3/AJChE/article/view/7686.