1. Energy information administration. International Energy Outlook, 2007. .
2. Commissions of the European Communities, Green Paper: A European Strategy for Sustainable, Competitive and Secure Energy, 8 March 2006, Brussels, {SEC (2006) 317}. .
3. Commissions of the European Communities, An Energy Policy for Europe, COM (2007) 1 final, Brussels, 10.01.2007. .
4. Commissions of the European Communities, Sustainable power generation from fossil fuels: aiming for near zero emissions from coal after 2020, COM (2006) 843 final, Brussels, 10.01.2007. .
5. European Commission, High Level Group on Hydrogen and Fuel Cells, Hydrogen and Fuel Cells – A vision of our future, Final Report, 2003. .