"Snapshot of Global PV 1992-2014"(PDF). iea-pvps.org/index.php?id=32. International Energy Agency — Photovoltaic Power Systems Programme. 30 March 2015. Archived from the original on 7 April 2015.
"NSR Austria 2020"(PDF). iea-pvps.org/index.php?id=32. International Energy Agency — Photovoltaic Power Systems Programme. 30 March 2015.
"Snapshot of Global PV 1992-2014"(PDF). iea-pvps.org/index.php?id=32. International Energy Agency — Photovoltaic Power Systems Programme. 30 March 2015. Archived from the original on 7 April 2015.