1. Cost effectiveness of variable speed operation for wind turbines;Bossanyi,1988
2. The application of broad range variable speed for wind turbine enhancement;Divalentin,1986
3. Variable rotor speed for wind turbines: Objectives and issues;Hinrischen,1985
4. Proceedings: Workshop on prospects and requirements for geographic expansion of end power usage;EPRI,1986
5. Design characteristics of a wind turbine optimized for utility use;Chapman,1988