1. International Energy Agency 2014 Technology Roadmap: Solar Photovoltaic Energy - 2014 Edition https://www.iea.org/publications/freepublications/publication/technology-roadmap-solar-photovoltaic-energy-2014-edition.html
2. National Resources Canada 2014 Improving Energy Performance in Canada - Report to Parliament Under the Energy Efficiency Act http://oee.nrcan.gc.ca/publications/statistics/parliament10-11/5.cfm?attr=0
3. Government of Canada 2015 http://www.nrcan.gc.ca/energy/publications/sciences-technology/renewable/solar-photovoltaic/16384
4. National Renewable Energy Laboratory 2006
5. Price development of photovoltaics modules, inverters, and systems in The Netherlands in 2012;Sark;Renewable Energy,2014