S. Salmi, A.A. Nuraini. “Effect of Coal With High Moisture Content on Boiler Operation Parameters at Thermal Coal Fired Power Plant”. PalArch’s Journal of Archaeology of Egypt / Egyptology, vol. 17, no. 9, Nov. 2020, pp. 6236 -47, https://www.archives.palarch.nl/index.php/jae/article/view/5182.