Impact of Coffee Grounds Addition on the Calorific Value of the Selected Biological Materials. Agricultural Engineering , [S. l.], v. 20, n. 1, p. 177–183, 2016. DOI: 10.1515/agriceng-2016-0018. Disponível em: https://ojs.agriceng.org/index.php/AgricEng/article/view/118.. Acesso em: 8 jan. 2025.