1. Wind at Work. Wind Energy and Job Creation in the EUhttp://www.ewea.org/fileadmin/ewea_documents/documents/publications/Wind_at_work_FINAL.pdf
2. Annual Wind Industry Report 2009http://www.awea.org/publications/reports/AWEA-Annual-Wind-Report-2009.pdf
3. European Wind Energy Councilhttp://www.erec.org/renewableenergysources/wind-energy.html
4. Distance Constant of the Risø Cup Anemometer;Kristensen,2002