MONIKA SMAGA. Quality parameters of the solid fuel produced from coffee grounds and tea grounds. ACTA INNOVATIONS, [S. l.], v. 20, p. 26–30, 2016. DOI: 10.62441/actainnovations.v20i.119. Disponível em: https://www.actainnovations.com/index.php/pub/article/view/20_4. Acesso em: 16 oct. 2025.