1. Wind energy conversion systems,1973-1975
2. Self-regulating Composite Bearingless Wind Turbine;Cheney;United Technologies Research Report R76-912185-2,1976
3. Investigation of a bearingless helicopter rotor concept having a composite primary structure;Bielawa;NASA CR-2636,1976
4. 100-kW Hingeless metal wind turbine blade design, analysis and fabrication;Donham,1975