Cost, Emission, and Thermo-Physical Determination of Heterogeneous Biodiesel from Palm Kernel Shell Oil: Optimization of Tropical Egg Shell Catalyst. Indones. j. sci. technol. [Internet]. 2024 Apr. 1 [cited 2026 Jun. 7];9(1):1-32. Available from: https://ijost.upi.edu/index.php/ijost/article/view/396