Saragih, Gimelliya, Vivi Purwandari, Nelson Silitonga, Abdillah, Yenny Sitanggang, Liver Zai, and Mukhtissiarni. 2025. “Valorization of Oil Palm Empty Fruit Bunches into Sulfonated Carbon Catalysts for Esterification of Vegetable Oil”. Chempublish Journal 9 (2):287-99. https://doi.org/10.22437/chp.v9i2.47630.