Anaerobic Co-Digestion of Municipal Sewage Sludge with Cow Dung at Different Ratio. Global Journal of Science Frontier Research, [S. l.], v. 18, n. H3, p. 15–20, 2018. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/2378. Acesso em: 24 sep. 2026.