Manatura, K., and L. Jau-Huai. “Equilibrium Modeling of Raw and Torrefied Leucaena in a Downdraft Fixed Bed Gasifier”. Journal of Research and Applications in Mechanical Engineering, vol. 5, no. 2, July 2018, pp. 74-81, https://ph01.tci-thaijo.org/index.php/jrame/article/view/133627.