@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/