1. Asama, J., Shinshi, T., Hoshi, H., Takatani, S. and Shimokohbe, A., A compact highly efficient and low hemolytic centrifugal blood pump with a magnetically levitated impeller, Artificial Organs, Vol.30, No.3 (2006), pp.160–167.
2. Gruber, W. and Amrhein, W., Bearingless segment motor with five stator elements–Design and optimization, IEEE Transactions on Industry Applications, Vol.45, No.4 (2009), pp.1301–1308.
3. Ishida, Y. and Liu, J., Elimination of unstable ranges in rotating machinery utilizing discontinuous spring characteristics, Transactions of the Japan Society of Mechanical Engineers, Series C, Vol.72, No.715 (2006), pp. 683–689 (in Japanese).
4. Ishida, Y. and Liu, J., Vibration suppression of rotating machinery utilizing discontinuous spring characteristics, Transactions of the Japan Society of Mechanical Engineers, Series C, Vol.70, No.696 (2004), pp.2188–2194 (in Japanese).
5. Marth, E., Jungmayr, G. and Amrhein, W., Influence of viscoelastic elements on magnetically passive stabilized degrees of freedom, Proceedings of the Twelfth International Symposium on Magnetic Bearings (ISMB 12) (2010).