1. BP Statistical Review of World Energy 2016 (BP, 2016); https://www.bp.com/content/dam/bp/pdf/energy-economics/statistical-review-2016/bp-statistical-review-of-world-energy-2016-full-report.pdf
2. World Energy Outlook 2015 (IEA, 2015); http://www.worldenergyoutlook.org/weo2015
3. Solar Quarterly Market Update—China, United States and Japan to Lead Global Solar Installation in 2016 (Mercom Capital Group, 2016); http://www.solareb2b.it/wp-content/uploads/2016/04/ForecastReports-MercomSolarQuarterlyMarketUpdateApr2016.pdf
4. 2014 Outlook: Let the Second Gold Rush Begin (Deutsche Bank, 2014); https://www.deutschebank.nl/nl/docs/Solar_-_2014_Outlook_Let_the_Second_Gold_Rush_Begin.pdf
5. Technology Roadmap for Photovoltaic (ITRPV): 2015 Results Including Maturity Report (VDMA Photovoltaic Equipment, 2016); http://www.itrpv.net/Reports/Downloads