Awaludin Martin, P. S. Utama, Y. R. Ginting, and N. Khotimah. “Improvement of Biocoal Quality from Empty Oil Palm Fruit Bunches by Using Peat Water to Reducing Potassium Content and Torrefaction at 300°C to Increasing Heating Value”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 90, no. 2 (December 29, 2021): 32–41. Accessed November 25, 2024. https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/245.