OECHSNER, Hans; WECKENMANN, Dieter; BUCHENAU, Carsten. Biogasanlagen in Baden-Württemberg. agricultural-engineering.eu, [S. l.], v. 53, n. 1, p. 20–21, 1998. DOI: 10.15150/lt.1998.2452. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/1998-53-1-020-021. Acesso em: 28 märz. 2024.