KARIMOV, K. S.; ABID, M.; ISLOMOV, S. I.; KARIMOVA, N. H.; AL-GRAFI, M. W. THE ECONOMICS OF BIOGAS PRODUCTION. IIUM Engineering Journal, [S. l.], v. 14, n. 2, 2013. DOI: 10.31436/iiumej.v14i2.413. Disponível em: https://journals.iium.edu.my/ejournal/index.php/iiumej/article/view/413. Acesso em: 17 jun. 2021.