Thong-Innatra, K., Theeraraj, G., Yuwaree, C., Charmondusit, K. and Hutacharoen, R. (2017) “A Study of Biodiesel (Ethyl Ester) Production from Grease/Oil Rich Sludge through Acid-Catalytic Ethanol Transesterification and It’s Fuel Specifications”, Environment and Natural Resources Journal. Nakhon Pathom, Thailand, 8(2), pp. 31–46. Available at: https://ph02.tci-thaijo.org/index.php/ennrj/article/view/82555 (Accessed: 6 May 2024).