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2 Weichbrodt, B. and Smith, K.A., 'Signature Analysis Non-Intrusive Techniques for Incipient Failure Identification - Application to Bearings and Gears', Proc. 5th Space Simulating Conf., 1970, National Bureau of Standards, Gaithersburg, MD.

3 Burchill, R.F., 'Resonant Structure Techniques for Bearing Fault Analysis', Proc. 18th Meeting MFPG, 1964, National Bureau of Standards, Gaithersburg, MD.

4 Darlow, M.S. and Badgley, R.H., 'Early Detection of Defects in Roller Element Bearings', SAE Paper 750209, 1975.

5 Babkin, A.S. and Anderson, J.J., 'Mechanical Signature Analysis of Ball Bearings', Application Note 3, December 1972, Federal Scientific.

6 Sramek, B., 'Frequency calculations for Ball Bearings', Preliminary note, April, 1978, Nicolet Scientific Corp.

7 Martin, R.L., 'Detection of Ball Bearing Malfunctions', J. Iustrum. Control Systems, 79 82, Dec. 1970.

8 Prashad, H., et al., 'Reliability Analysis of Anti-friction Bearings by High Frequency Resonance Technique', BHEL J., 1985, 6 (1), 1 15.

9 Prashad, H., Ghosh, M. and Biswas, S., 'Diagnostic Monitoring of Rolling-Element Bearings by High Frequency Resonance Technique', ASLE Trans., 1985, 28 (4), 39 448.