@article{IM_1973__20_142204,
     author = {H.E. Cabral},
     title = {On the {Integral} {Manifolds} of the {N-Body} {Problem.}},
     journal = {Inventiones mathematicae},
     pages = {59--72},
     publisher = {mathdoc},
     volume = {20},
     year = {1973},
     zbl = {0262.70014},
     url = {http://geodesic.mathdoc.fr/item/IM_1973__20_142204/}
}