Khairuddin Md Isa, L.J. Ying, Saiful Azhar Saad, Farizul Hafiz Kasim, and Mohd Asri Ab Rahim. “Pyrolysis of Oil Palm Fronds in a Fixed Bed Reactor and Optimisation of Bio-Oil Using Box-Behnken Design”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, vol. 27, no. 1, Nov. 2016, pp. 12-18, https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/2603.