1. 1) Chaiseri, P.: Damper for Tower-like Structure Utilizing Liquid Motion as Energy Dissipator, Master Thesis, Dept. of Civil Engg. Univ. of Tokyo, Japan, 1987.
2. 2) Bhuta, P. G. and Koval, L. R.: A Viscous Ring Damper for a Freely Precessing Satellite, International Journal of Mechanical Science, Vol. 8, pp. 383-395, 1966.
3. 3) Watanabe, S.: Methods of Vibration Reduction, Proc. Japan Naval. Arch. Soc. Symp., pp. 156-189, 1969 (In Japanese).
4. 4) Modi, V. J. and Welt, F.: Vibration Control Using Nutation Dampers, Proc. International Conference on Flow Induced Vibrations, England, pp. 369-376, 1987.
5. 5) Welt, F.: A Study of Nutation Dampers with Application to Wind Induced Oscillations, Ph. D. Thesis, The University of British Columbia, 204 pp., 1988.