1. Wind in Europe: developments in the policy frameworks for wind energy;Pollard;Renewable Energy World,2001
2. P. Grud, State of the art offshore wind technology, Workshop Offshore—Windenergienutzung Technik, Naturschutz, Planning, Deutsches Windenergie-Institut GmbH, Wilhelmshafen, 27 June 2000.
3. M. Bruntt, J. Havsager, H. Knudsen, Incorporation of wind power in the East Danish power system, Paper BPT99-202-50, in: Proceedings of the IEEE Power Tech'99 Conference, Budapest, Hungary, August 29–September 2, 1999.
4. V. Akhmatov, H. Knudsen, A.H. Nielsen, N.K. Poulsen, J.K. Pedersen, Short-term stability of large-scale wind farms, Paper PG 3.56, in: Proceedings of the European Wind Energy Conference (EWEC-2001), July 2–6, 2001, Copenhagen, Denmark.
5. Advanced simulation of windmills in the electrical power supply;Akhmatov;Int. J. Electrical Power Energy Syst.,2000