1. American Petroleum Institute (API) Standard 684, Tutorial on the API Standard Paragraphs Covering Rotor Dynamics and Balance (An Introduction to Lateral Critical and Train Torsional Analysis and Rotor Balancing), 1996.
2. ISO 14839-2:2004 Standard, Mechanical Vibration – Vibration of Rotating Machinery Equipped with Active Magnetic Bearings – Part 2: Evaluation of Vibration, 2004.
3. H.D. Taylor, Rubbing shafts above and below resonant speed, GE Technical Information Series, No. 16709, 1924.
4. Shaft rubbing;Newkirk;Mechanical Engineering,1926
5. R.P. Kroon, W.A. Williams, Spiral vibration of rotating machinery, in: Proceedings of the Fifth International Congress of Applied Mechanics, Wiley, New York, 1939, pp. 712–718.