1. On the kinetic energy spectrum of atmospheric motions in the planetary boundary layer;Petersen;Risø Report No. 285,1975
2. Economic viability of large wind generator rotors;Rosen,1975
3. Economy and operation of wind power plants;Juul,1961
4. Efficiency and economic comparison of different WEG rotor systems;Dörner,1975
5. Wind energy measurements;Jensen,1961