1. Royalance B J, 'Machine failure and its avoidance - what is tribology's contribution to effective maintenance?', Proc. Instn Mech. Engrs Vol. 217 Part J: J. Engineering Tribology.
2. Bachschmid N., Pennacchi P. and Vania A., 'Identification of Multiple Faults in Rotor Systems',Journal of Sound and Vibration, Vol.254, No.2(2002), pp327-366.
3. Platz R. and Markert R., 'Faults Models for Online Identification of Malfunctions I Rotor Systems', Proc. Of Surveillance 4-Acoustical and Vibratory Surveillance Methods and Diagnostic Techniques, Compiegne, France,(2001), pp435-446.
4. Mowbray J., 'Reliability-centred Maintenance', 1991(Butter-worth-Heinemann,Oxford)
5. Hunter R.C., 'Engine failure prediction technique', Aircraft Engng, 1975