1. The causes and the control of electrical currents in bearings;Boyd;Lubr. Eng.,1959
2. Prediction of Bearing Wear due to Shaft Voltage in Electrical Machines;Bradford,1984
3. Flow of electrical current through lubricated contacts;Chu;ASLE Trans.,1967
4. The conduction of current in bearings;Kaufman,1958
5. Bearing Contact Resistance as a Diagnostic Aid;Smith,1975