1. The Causes and Control of Electrical Currents in Bearings,;Boyd;Lubrication Engineering,1959
2. The Importance of Grounding Brushes to the Safe Operation of Large Turbine Generators,;Buckley;IEEE Transactions on Energy Conversion,1988
3. J. Sparks Power Generation and Transmission 114 1980
4. 34
5. lnter-Laminar Insulation Test for Synchronous Machine Stators,;Tomlinson;AIEE Transactions,1952