Manurung, R., Taslim, and A.G.A. Siregar. “Deep Eutectic Solvents Based Choline Chloride for Enzymatic Biodiesel Production from Degumming Palm Oil”. Asian Journal of Chemistry 32, no. 4 (February 25, 2020): 733–738. Accessed May 2, 2024. https://asianpubs.org/index.php/ajchem/article/view/32_4_2.