@article{GDZPPN002088592,
title = {Topology and Mechanics. II. The Planar n-Body Problem.},
journal = {Inventiones mathematicae},
volume = {11},
year = {1970},
pages = {45-64},
zbl = {0203.26102},
url = {http://dml.mathdoc.fr/item/GDZPPN002088592}
}
Smale, S. Topology and Mechanics. II. The Planar n-Body Problem.. Inventiones mathematicae, Tome 11 (1970) pp. 45-64. http://gdmltest.u-ga.fr/item/GDZPPN002088592/