Miyuranga, K.A.V., D. Thilakarathne, Udara S.P.R. Arachchige, R.A. Jayasinghe, and N.A. Weerasekara. “Catalysts for Biodiesel Production: A Review”. Asian Journal of Chemistry 33, no. 9 (August 20, 2021): 1985–1999. Accessed May 5, 2024. https://asianpubs.org/index.php/ajchem/article/view/33_9_3.