1. Snapshot of Global PV Market;IEA-PVPS,2014
2. Renewables 2015-Global Status Report, Annual Reporting on Renewables: 10 Years of Excellence, produced by REN21.
3. Photovoltaic Barometer,2015
4. Key World Energy Statistics;IEA,2013
5. Global Market Outlook for Photovoltaics 2014–2018,2014