1. Eltra, specifications for connecting wind farms to the transmission network, second ed., Eltra Transmission System Planning, Denmark, Document ELT1999-411a (available on: www.eltra.dk).
2. Incorporation of wind power in the East Danish power system;Bruntt,1999
3. V. Akhmatov, Analysis of dynamic behaviour of electric power systems with large amount of wind power, Ph.D. Thesis, Technical University of Denmark, Lygby, Denmark, April 2003, p. 272 (available on: www.oersted.dtu.dk/eltek/res).
4. DEFU, Grid Connection of Decentralized Generation Units, The Committee Report KR-88, DEFU, Copenhagen, Denmark, March 1991, p. 61 (in Danish).
5. DEFU, Connection of Wind Turbines to Low and Medium Voltage Networks, The Committee Report KR-111-E, second ed., DEFU, Copenhagen, Denmark, October 1998, p. 73.