1. Reduction by Stages;Marsden,2007
2. Difference schemes for Hamiltonian formalism and symplectic geometry;Feng;J. Comput. Maths.,1986
3. How to compute properly Newtons equation of motion?;Feng,1992
4. Variations on a theme by Euler;Feng;J. Comput. Maths.,1998
5. Geometric Numerical Integration. Structure- Preserving Algorithms for Ordinary Differential Equations;Hairer,2003