1. Lord Rayleigh, Theory of Sound (two volumes), 2nd Edition, Dover Publications, New York, (1945 re-issue).
2. The Finite Element Method;Zienkiewicz,1991
3. Modal Testing: Theory and Practice;Ewins,1984
4. Identification of damping: part 1, viscous damping;Adhikari;Journal of Sound and Vibration,2001
5. Identification of damping: part 2, non-viscous damping;Adhikari;Journal of Sound and Vibration,2001