@article{NUMA_1976__26_132397,
     author = {R.A. LaBudde and D. Greenspan},
     title = {Energy and {Momentum} {Conserving} {Methods} of {Arbitrary} {Order} for the {Numerical} {Integration} of {Equations} of {Motion.} {II.} {Motion} of a {System} of {Particles.}},
     journal = {Numerische Mathematik},
     pages = {1--16},
     publisher = {mathdoc},
     volume = {26},
     year = {1976},
     zbl = {0382.65031},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1976__26_132397/}
}