1. The self starting of vertical axis wind turbines;Baker,1982
2. Unsteady aerodynamics of vertical axis wind turbines;Duremberg,1979
3. A correlation of low speed airfoil section stalling characteristic tics with Reynolds number and airfoil geometry;Gault;NACA TN 3963,1957
4. Fluid dynamic lift;Hoerner,1975
5. Correspondence between the author and Peter Holdsworth, Te Karaka, Gisborne