1. Kyoto Protocol to the United Nations Framework Convention on Climate Chance;United Nations Framework Convention on Climate Change,1998
2. Directive 2001/77/EC of the European Parliament and of the Council of 27 September 2001 on the promotion of electricity produced from renewable energy sources in the internal electricity market;European Parliament and the Council,2001
3. Directive 2009/28/EC of the European Parliament and of the Council of 23 April 2009 on the promotion of the use of energy from renewable sources and amending and subsequently repealing Directives 2001/77/EC and 2003/30/EC;European Parliament and the Council,2009
4. An energy policy for Europe;Commission of the European Communities,2007
5. American recovery and reinvestment act;United States Congress,2009