Setiawan, R., H. F. Hidayat, H. Dafiqurrohman, A. Surjosatyo, and R. Dhelika. “Performance Evaluation of a Continuous Downdraft Gasification Reactor Driven by Electric Motors With Manual Mode of Operation”. Journal of Engineering and Technological Sciences, vol. 54, no. 4, July 2022, p. 220405, doi:10.5614/j.eng.technol.sci.2022.54.4.5.