HÜGLE, Thomas; ANDREE, Helga; JACOBSEN, Malte. Biogasanlagen. agricultural engineering.eu, [S. l.], v. 56, n. 5, p. 332–333, 2001. DOI: 10.15150/lt.2001.1798. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/2001-56-5-332-333. Acesso em: 3 mai. 2024.