1. Last comparison of windmill and engine pumps;Marchesini,1978
2. Wind Systems Programme, A guide to commercially available machines;U.S. Department of Energy Rep. 2836/3533/78/3,1978
3. The Generation of Electricity by Wind Power;Golding,1976
4. Wind Machines;Eldridge,1980
5. Aerodynamic performance of vertical and horizontal axis wind turbines;Randall;J. Energy,1981