KARNNASUTA, S., V. PUNSUVON, and R. NOKKAEW. “Biodiesel Production from Waste Coconut Oil in Coconut Milk Manufacturing”. Walailak Journal of Science and Technology (WJST), vol. 12, no. 3, Dec. 2013, pp. 291-8, https://wjst.wu.ac.th/index.php/wjst/article/view/687.