Wirawan, Sang Kompiang, Daniel Timotius, Ivone Marselina Nugraha, Asdi Restana, Afrizal Luthfi Anggara, and Sayoga Hidayatullah. 2022. “Kinetics and Adsorption Equilibrium Study of Free Fatty Acid (FFA) from Crude Palm Oil (CPO) on Anionic Resin”. ASEAN Journal of Chemical Engineering 22 (1), 33-41. https://journal.ugm.ac.id/v3/AJChE/article/view/9238.