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3. , International review of grid connection requirements for wind turbines. Nordic wind Power Conference, 6 pp, 2004.
4. Grid requirements challenges for wind turbines. Fourth International Workshop on Large-scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms, Billund, 6 pp, 2003.
5. Analysis of dynamic behavior of electric power systems with large amount of wind power. PhD Thesis, Ørsted DTU, 2003.