HASIBUAN, R.; SETIAWAN, A.; FAISAL, F. Utilization of Syngas as Co-firing Fuel for Carbonization of Arabica Coffee Pulp. Journal of Engineering and Technological Sciences, [S. l.], v. 56, n. 6, p. 771–780, 2024. DOI: 10.5614/j.eng.technol.sci.2024.56.6.8. Disponível em: https://jets.itb.ac.id/jets/article/view/581. Acesso em: 4 sep. 2025.