@article{ND_2005_1_1_a7,
     author = {A. Chenciner},
     title = {A note by {Poincar{\'e}}},
     journal = {Russian journal of nonlinear dynamics},
     pages = {143--154},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2005_1_1_a7/}
}