“Optimization of Biodiesel Production from Palm Kernel Oil Using Heterogeneous Catalyst: Physicochemical Characterization and Process Parameter Effects”. International Journal of Innovative Science and Modern Engineering (IJISME) 12, no. 6 (June 29, 2024): 6–14. Accessed October 6, 2024. https://journals.blueeyesintelligence.org/index.php/ijisme/article/view/395.