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@article{DAN_1960_133_2_a13, author = {K. Sitnikov}, title = {The existence of oscillatory motions in the three-body problems}, journal = {Doklady Akademii Nauk}, pages = {303--306}, publisher = {mathdoc}, volume = {133}, number = {2}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1960_133_2_a13/} }
K. Sitnikov. The existence of oscillatory motions in the three-body problems. Doklady Akademii Nauk, Tome 133 (1960) no. 2, pp. 303-306. http://geodesic.mathdoc.fr/item/DAN_1960_133_2_a13/