1. Proceedings of the Sixth International Symposium on Magnetic Bearings;Carabelli,1998
2. Proceedings of the Sixth International Symposium on Magnetic Bearings;Cole,1998
3. Proceedings of the Seventh International Symposium on Magnetic Bearings;Fujiwara,2000
4. Nonlinear Oscillations, Dynamical Systems, and Bifurcations of Vector Fields;Guckenheimer,1986