Bifurcation of Multiple Limit Cycles for a Rotor-Active Magnetic Bearings System with Time-Varying Stiffness. - J. Li; Y. Tian; W. Zhang; S. F. Miao (Int. J. Bifurc. Chaos, 2008)

Bifurcation set and number of limit cycles in Z2-equivariant planar vector fields of degree 5. - Jing Li; Wei Zhang; S. F. Miao; Min Sun; Y. Tian (Appl. Math. Comput., 2012)