1. International Energy Agency (IEA). Technology roadmap—solar photovoltaic energy. Paris, France: International Energy Agency, IEA/OECD; 2010. p. 1–48.
2. Renewable Energy Policy Network for the 21st century (REN21). Renewables 2012. Global status report. 〈http://www.map.ren21.net/GSR/GSR2012_low.pdf〉; 2012
3. Observatoire des Energies Renouvelables (Observ´ER). Worldwide electricity production from renewable energy sources. Stats and Figures series. Thirteenth inventory. 〈http://www.energies-renouvelables.org/observ-er/html/inventaire/Eng/organisation.asp〉; 2011.
4. International Energy Agency (IEA). Technology roadmap-concentrating solar power. Paris, France: International Energy Agency, IEA/OECD; 2010. p. 1–52.
5. A review of solar photovoltaic levelized cost of electricity;Branker;Renewable and Sustainable Energy Reviews,2011