1. Eurostat (September 2012). Renewable energy statistics, [Online]. Available: http://epp.eurostat.ec.europa.eu/statistics_explained/index.php/Renewable_energy_statistics . Accessed 22 December 2012.
2. EWEA (February 2011). Wind in power. 2010 European Statistics, [Online]. Available: http://www.ewea.org/fileadmin/ewea_documents/documents/statistics/EWEA_Annual_Statistics_2010.pdf . Accessed 21 December 2012.
3. EWEA (April 2012). Green Growth. The impact of wind energy on jobs and the economy, [Online]. Available: http://www.ewea.org/fileadmin/files/library/publications/reports/Green_Growth.pdf . Accessed 21 December 2012.
4. REN21 (2012). Renewable 2012: Global status report, [Online]. Available: http://www.ren21.net/Portals/0/documents/activities/gsr/GSR2012_low%20res_FINAL.pdf . Accessed 22 December 2012.
5. EWEA (March 2009). About wind energy - the facts, [Online]. Available: http://www.wind-energy-the-facts.org/ . Accessed 21 December 2012.