1.www.cfd-online.com
2.http://www.windbluepower.com/Permanent_Magnet_Alternator_Wind_Blue_Low_Wind_p/dc-540.htm
3.Low Speed Wind Turbine Design by Horizon Gitano-Briggs, Kuala Lumpur University, Malaysia
4.Small Scale Wind Turbines Optimized for Low Wind Speeds T. Letcher, The Ohio State University, Columbus, OH