Baskoro, A. N., F. H. Taskaya, I. S. J. M. Prajasto, and Robby Anggoro. “Heat Quality Enhancement and Carbon Dioxide Emissions Reduction from Coal Burning by Combining Low-Ranked Coal With Biomass Waste As A Clean Energy Solution to Achieve Energy Security in Indonesia”. Indonesian Journal of Energy, Vol. 4, no. 2, Aug. 2021, pp. 115-28, doi:10.33116/ije.v4i2.120.