%0 Journal Article %A R.A. LaBudde %A D. Greenspan %T Energy and Momentum Conserving Methods of Arbitrary Order for the Numerical Integration of Equations of Motion. II. Motion of a System of Particles. %J Numerische Mathematik %D 1976 %P 1-16 %V 26 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1976__26_132397/ %F NUMA_1976__26_132397