1. 2020 Energy Strategy (https://ec.europa.eu/energy/en/topics/energy-strategy-and-energyunion/2020-energy-strategy)
2. 2030 Energy Strategy (https://ec.europa.eu/energy/en/topics/energy-strategy-and-energyunion/2030-energy-strategy)
3. IEA Bioenergy Webinar – The past, present and future for biomass gasification https://www.ieabioenergy.com/wp-content/uploads/2020/01/ The_past_present_and_future_for_biomass_gasification_30_Jan_2020_webinar.pdf
4. FEE, Fördergeselschaft Erneuerbare Energien e.V., www.fee-ev.de
5. Higman Consulting GmbH