1. Greenpeace. Wind Force 12. Available on-line: http://www.greenpeace.org.nz/pdf/wind-force-12-2003.pdf
2. Hilger C. Wind power and impacts on power system operation—Eltra, In: Denmark. Wind power and impacts on power systems conference, Oslo, 17–18 June 2002.
3. Voltage rise: the big issue when connecting embedded generation to long 11kV overhead lines;Masters;IEE Power Engineering Journal,2002
4. Garrad Hassan Ltd. The impacts of increased levels of wind penetration on the electricity systems of the republic of Ireland and Northern Ireland: Final Report, 11 February 2003. Available on-line: http://www.cer.ie/cerdocs/cer03024.pdf
5. Akhmatov V. Voltage stability of large power networks with a large amount of wind power. ELTRA large-scale intregration of wind power and transmission networks for offshore wind farms seminar in Billund, Denmark 20–22 October 2003. Available on-line: http://www.eltra.dk/composite-15378.htm