1. What does 20% look like? Development in wind technology and system;Smith;IEEE Power & Energy Magazine,2007
2. Energy White Paper: Meeting the Energy Challenge, 2007 [Online]. Available: http://www.gov.uk/energy/whitepaper.
3. 2009 Market Report, AWEA [Online]. Available: http://www.awea.org.
4. Green Energy Projects Increase, China Climate Change Info-Net [Online]. Available: http://www.ccchina.gov.cn.
5. Predicting the wind;Ernst;IEEE Power & Energy Magazine,2007