Wichianphong, Napada, and Wongduan Maison. “Preparation of Biofuel Pellets from Water Hyacinth and Waste Coffee Grounds”. RMUTSB ACADEMIC JOURNAL 8, no. 2 (December 29, 2020): 140–152. Accessed April 29, 2024. https://li01.tci-thaijo.org/index.php/rmutsb-sci/article/view/247484.