1) Understanding Renewable Energy Systems, Quashning, Volker, Earthscan Publications Ltd, 2005
2) Renewable Energy, Sorensen, Bent., Academic Press, London, Third Edition, 2004
3) Renewable Energy – Sources for Fuels and Electricity, Johansson, Thomas B., et al., Island Press, Washington DC, 1993.
Webliography:
1) Proof of the Betz Limit - http://www.motiva.fi/myllarin_tuulivoima/windpower%20web/en/stat/betzpro.htm