1. Some cases of the dependence of periodic motions on parameters;Neimark;Dokl Akad Nauk SSSR (In Russian),1959
2. Qualitative description of strong resonance in a nonlinear system;Melnikov;Dokl Akad Nauk SSSR (In Russian),1963
3. A new approach to the perturbation theory of invariant surfaces;Sacker;Comm Pure Appl Math,1965
4. Elements of applied bifurcation theory;Kuznetsov,2004
5. Torus birth bifurcation in a DC/DC converter;Zhusubaliyev;IEEE Trans Circuits Syst I,2006