1. J. T. Broch: Mechanical Vibration and shock Measurements (Denmark, K. Larsen and Son, 1984), p.370.
2. Mechanical Vibration and Evaluation of Machine Vibration by Measurements on Non-rotating Parts (Part 1, ISO 10816-1: General Guidelines, Geneva 20, Switzerland, 15-12-1995), p.19.
3. Vibrospect FFT Signal library. Practical vibration analysis examples: vibration symptoms, mechanical sources, corrective measures (Pruftechnik AG Documentation, VIB 9. 9679, Germany, Jan 1996), p.35.
4. L. Morairu, T. S. Keith, F. Dimotte, S. Cioc and D. P. Fleming: Dynamic Modeling of a Dual Clearance Squeeze Film Damper Model with One Damper (Lubrication Engineering, 2003) pp.16-25.
5. A. Daktariunas, V. Vekteris, M. Jurevichius: Mechatronical System of Drill Testing (Proceedings of the 11th World Congress in Mechanism and Machine Science, IFToMM, 1-2 April 2004, Tianjin, China, Proceedings Vol. 3, China Machine Press, 2004), pp.1326-1330.