1. The Danish Energy Agency’s Map of Energy Streams (In Danish): http://www.ens.dk/da-DK/Info/TalOgKort/Statistik_og_noegletal/Aarsstatistik/Documents/Energistr%C3%B8m%202009.pdf.
2. The Danish Energy Agency’s Interactive Energy Maps: http://www.ens.dk/en-US/Info/FactsAndFigures/EnergyInfoMaps/InteractiveMaps/Sider/Forside.aspx.
3. B&W Vølund – Up-date on the Harboøre Technology;Heeb,2010
4. Biomass CHP Plant Güssing – A Success Story, Hofbauer Hermann, Rauch Reinhard, Bosch Klaus, Koch Reinhard, Aichernig Christian.
5. “Indirectly Heated Gasifiers – the Case of the Güssing Reactor”, 1st European Summer School on Renewable Motor Fuels, Birkenfeld, Germany;Rauch,2005