www.fractal.hr
www.ewea.org
www.awea.org
www.enercon.de
www.vestas.com
www.acciona-energia.es
www.nordex-online.com
www.suzlon.com
www.repower.com
www.ge-energy.com/businesses/ge_wind_energy/en/index.htm
www.mhi.co.jp/en/products/category/wind_turbine_generators.html
www.gamesa.es/en
www.powergeneration.siemens.com/products-solutions-services/products-packages/wind-turbines/
www.clipperwind.com/
www.garradhassan.com/
www.dewi.de
www.risoe.dk/About_risoe/research_departments/VEA.aspx
www.nrgsystems.com