@article{NUMA_1992__61_3_133622,
     author = {J.M. Sanz-Serna and T. Eirola},
     title = {Conservation of integrals and symplectic structure in the integration of differential equations by multistep methods.},
     journal = {Numerische Mathematik},
     pages = {281--290},
     publisher = {mathdoc},
     volume = {61},
     number = {3},
     year = {1992},
     zbl = {0741.65056},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1992__61_3_133622/}
}