1. Group Theoretic Methods in Bifurcation Theory;Sattinger,1979
2. Local Bifurcation and Symmetry;Vanderbauwhede,1982
3. Topological Transformation Groups;Montgomery,1965
4. Note on symmetry and bifurcation near families of solutions;Vanderbauwhede;J. diff. Eqns,1983
5. Continuous and Discrete Dynamics Near Manifolds of Equilibria;Aulbach,1984