1. Al-Khafaji, A.W. and Tooley, J.R. (1986).Numerical method in engineering practice, Holt, Reinhardt and Winston, Inc.
2. Chun, K.R. (1972). “Free vibrations of beams with one end spring-hinged and the other free.”Journal of Applied Mechanics, Vol. 39, pp. 1154–1155.
3. Gere, J.M. and Timoshenko, S.P. (1997).Mechanics of materials, PWS Publishing Company, U.S.A.
4. Gupta, A.K. (1985). “Vibration of tapered beams.”Journal of Structural Engineering, ASCE, Vol. 111, No. 1, pp. 19–36.
5. Laura, P.A.A., Irassar, P.V.D. and Ficcadenti, G.M. (1983). “A note on transerse vibration of continuous beam subject to an axial force and carrying concentrated masses.”Journal of Applied Mechanics, Vol. 86, pp. 279–284.