1. KER WILSON, W.: Practical Solution of Torsional Vibration Problems, Vol. 2, 1963, London: Chapman and Hall.
2. KONONENKO, V.O.: Vibrating Systems with a Limited Power Supply, 1969, London: Iliffe Books.
3. SMITH, D.M.: The Motion of a Rotor carried by a Flexible Shaft in Flexible Bearings, 1933, Proc. R. Soc. London: 142, 92.
4. SMITH, D.M.: Journal Bearings in Turbomachinery, 1969, London: Chapman and Hall.
5. TONDL, A.: Some Problems of Rotor Dynamics, 1965, London: Chapman and Hall.