1. European Commission. Energy Roadmap 2050, Communication from the commission to the European Parliament, the council, the European economic and social committee and the committee of the regions, COM (2011). Brussels; 2011.
2. Anonymous. Energieakkoord voor duurzame groei (Energy covenant for sustainable growth); 2013.
3. Rabobank Cijfers & Trends. Welke duurzame energie win(d)t? Een doorkijk naar de ontwikkelingen in Nederland tot 2020 (Which sustainable energy will win? A view on developments in the Netherlands till 2020); 2014.
4. Review of concepts for a demand-driven biogas supply for flexible power generation;Hahn;Renew Sustain Energy Rev,2014
5. Lensink S. Eindadvies basisbedragen SDE+ 2014 (Final advice cost prices SDE+). Report ECN-E-13-050; 2013.