1. Nonlinear Oscillation, Dynamical Systems, and Bifurcation of Vector Fields;Guckenheimer,1987
2. Singularities and Groups in Bifurcation Theory;Golubitsky,1985
3. Elementary Stability and Bifurcation Theory;Iooss,1980
4. Application of Centre Manifold Theory;Carr,1981
5. Numerical solutions of bifurcation and non-linear eigenvalue problems;Keller,1977