SIHOMBING, T.; MARTIN, A. Analysis of Combustion Characteristics in Boilers Using Comparison of Coal Fuel Mixtures and Bark Biomass To Determine Optimal Combustion Conditions in a Steam Power Plant. INVOTEK: Jurnal Inovasi Vokasional dan Teknologi, v. 23, n. 1, p. 43-52, 14 out. 2023.