1. Arithmetic Applied Mathematics;Greenspan,1980
2. Discrete Numerical Methods in Physics and Engineering;Greenspan,1974
3. Energy and momentum conserving methods of arbitrary order for the numerical integration of equations of motion;La Budde;Numer. Math.,1976
4. Discrete Hamiltonian mechanics;La Budde;Internat. J. Gen. Systems,1980
5. Remarks on a numerical method for integrating the Lagrange equations;Gotusso,1984