RAHMAT, A.; MUTOLIB, A.; SUKAMTO, S. Elemental content of coffee waste biochar under different temperatures of pyrolysis. Open Science and Technology, [S. l.], v. 2, n. 2, p. 198–202, 2022. DOI: 10.33292/ost.vol2no2.2022.79. Disponível em: https://opscitech.com/journal/article/view/79. Acesso em: 16 sep. 2025.