1. Courant R, Hilbert D (1962) Methods of mathematical physics, vol I, 1953, vol II. InterScience Publishers, New York
2. Davis C, Kahan WM (1970) The rotation of eigenvectors by a perturbation. III. SIAM J Num Anal 7(1):1–46
3. Gantmacher FP, Krein MG (1961) Oscillation matrices and kernels and small vibrations of mechanical systems. U. S. Atomic Energy Commission, Washington
4. Gladwell GML (2004) Inverse Problems in Vibration. 2nd edn. Springer, Dordrecht (1986, 1st edn, Martinus Nijhoff Publishers, Dordrecht)
5. Shigley JE, Mischke CR, Budynas RG (2004) Mechanical engineering design. McGraw-Hill Professional