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2. Bisplinghoff, R. L., Mar, J. W. and Pian, T. H. H., Statics of Deformable Solids, Addison-Wesley, 1965.
3. Timoshenko, S. P. and Goodier, J. N., Theory of Elasticity, McGraw-Hill, 1951.
4. Meirovitch, L., Elements of Vibration Analysis, McGraw-Hill, 1975.
5. Crandall, S. and Mark, W. D., Random Vibration in Mechanical Systems, Academic Press, 1963.