1. Geometrical Methods in the Theory of Ordinary Differential Equations;Arnol'd,1983
2. Introduction to Compact Transformation Groups;Bredon,1972
3. Structures in Dynamics;Broer,1991
4. The decomposition of a linear mapping;Burgoyne;Linear Algebra Appl.,1974
5. Normal forms for real linear Hamiltonian systems;Burgoyne,1977