@article{NUMA_1992__61_3_133635,
     author = {H.J. Pesch and S. Miesbach},
     title = {Symplectic phase flow approximation for the numerical integration of canonical systems.},
     journal = {Numerische Mathematik},
     pages = {501--522},
     year = {1992},
     volume = {61},
     number = {3},
     zbl = {0755.65074},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1992__61_3_133635/}
}