“Production of Methyl Ester from Coconut Oil Using Heterogeneous K γ-Al2O3 under Microwave Irradiation”. Journal of Chemical Process Engineering 5, no. 2 (November 30, 2020): 23–29. Accessed August 28, 2025. https://jurnal.fti.umi.ac.id/index.php/JCPE/article/view/861.