1. BMUB, 2017. Greenhouse-gas neutral Germany 2050: The Climate Action Plan 2050. https://www.bmub.bund.de/en/topics/climate-energy/climate/national-climate-policy/greenhouse-gas-neutral-germany-2050/. Accessed 2 Nov 2017
2. BMWI, 2017. Erneuerbare Energien in Zahlen: Nationale und internationale Entwicklung im Jahr 2016. BMWI, 80 pp. https://www.bmwi.de/Redaktion/DE/Publikationen/Energie/erneuerbare-energien-in-zahlen-2016.pdf?__blob=publicationFile&v=10. Accessed 2 Nov 2017
3. M Scheftelowitz R Becker D Thrän 2018 Improved power provision from biomass: a retrospective on the impacts of German energy policy Biomass Bioenerg 111 1 12 https://doi.org/10.1016/j.biombioe.2018.01.010
4. Daniel-Gromke J, Rensberg N, Denysenko V, Trommler M, Reinholz T, Völler K, Beil M, Beyrich W (2017) Anlagenbestand Biogas und Biomethan: Biogaserzeugung und -nutzung in Deutschland. (DBFZ-Report, 30). Leipzig: DBFZ. X, 75 S. ISBN: 978–3–946629–24–5
5. Thrän 2019 Governance of Sustainability in the German biogas sector – Adaptive Management of the Renewable Energy Act between Agriculture and the Energy Sector Sustainability and Society Energy