1. International Energy Agency. World Energy Outlook. Published in France by IEA Publications; 2010. ISBN: 978-92-64-08624-1. .
2. REN21. Renewables 2010 Global Status Report (Paris: REN21 Secretariat); 2010. .
3. International Energy Agency. Technology roadmap-concentrating solar power. Published in France by IEA Publications; 2010. .
4. IEA. Trends in photovoltaic applications-Survey report of selected IEA countries between 1992 and 2011. Report IEA-PVPS T1-21:2012; 2012. ISBN: 9783906042091. .
5. Hearps P, McConnell D. Renewable energy technology cost review. Melbourne Energy Institute – Technical Paper Series. Published in Australia; 2011. .