1. Rao, J. S.: ‘Vibratory condition monitoring of machines’, (CRC Press Plc 2000 September)
2. Tavner, P., and Penman, J.: ‘Condition monitoring of electrical machines’, (Research Studies Press, Letchworth, Hertfordshire, England 1987), p. 203–205
3. Detection of AC machine winding deterioration using electrically excited vibrations