F. A. Alaw and N. S. Sulaiman, “A REVIEW OF BOILER OPERATIONAL RISKS IN EMPTY FRUIT BUNCH FIRED BIOPOWER PLANT”, J. Chem. Eng. Ind. Biotechnol., vol. 5, no. 2, pp. 29–35, Apr. 2020, doi: 10.15282/jceib.v5i2.3624.