1. BTM Consult: ‘International wind energy development – world market update 2004’. 2005
2. DENA: ‘Planning of the grid integration of wind energy in Germany onshore and offshore up to the year 2030 (dena grid-study), Deutsche Energie-Agentur’, www.dena.de, 2005
3. Meibom P., Barth R., Norheim I., Ravn H., Sørensen P.: ‘Final technical report in the Wilmar project’, www.wilmar.risoe.dk, 2006
4. Wind plant integration [wind power plants