1. Ernst & Young. 2013. Renewable energy country attractiveness indices, February 2013 Issue 36.
2. IPCC. 2012. Renewable Energy Sources and Climate Change Mitigation, Special Report of the Intergovernmental Panel on Climate Change (IPCC).
3. European Commission. 2012.Annual report on progress towards achieving the Kyoto objectives, Communication (COM (2012)626).
4. IEA, Redrawing the Energy-Climate Map, Aprilie 2013.
5. The Renewable Energy Directive's 27 National Renewable Energy Action Plan.