Rian C Sondakh, Erliza Hambali, Nastiti S Indrasti. Esterification Bio-oil using Acid Catalyst and Ethanol. int. j. eng. mgmt. res. [Internet]. 2018 Oct. 31 [cited 2026 Mar. 17];8(5):137-41. Available from: https://ijemr.vandanapublications.com/index.php/j/article/view/599