1. http://www.zsw-bw.de/uploads/media/pi18-2013-ZSW-WorldrecordCIGS.pdf
2. http://www.solar-frontier.com/eng/news/2012/C002980.html
3. http://www.pv-tech.org/news/intersolar_eu_2013_tsmc_solar_takes_champion_cigs_module_to_15.7_efficiency
4. http://www.ge-energy.com/products_and_services/products/solar_power/cdte_thin_film_solar_module78.jsp