Rattanapunt, Prateep, Chern Com-arch, Sopida Sungsoontorn, and Ratthasak Prommas. 2018. “A Study of Characteristics of Palm Oil Biomass by Using Torrefaction Process”. Science & Technology Asia 23 (4):23-31. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/160794.