Karnasuta, Sujinna, Vittaya Punsuvon, and Rayakorn Nokkaew. “Tallow Waste Utilization from Leather Tanning Industry for Biodiesel Production”. Journal of Renewable Energy and Smart Grid Technology 8, no. 1 (December 18, 2014): 49–58. Accessed May 19, 2024. https://ph01.tci-thaijo.org/index.php/RAST/article/view/26262.