@article{TRSPY_1994_205_a1,
     author = {S. S. Anisov},
     title = {On the topology of an integrable {Hamiltonian} system in the neighborhood of degenerate one-dimensional trajectory},
     journal = {Informatics and Automation},
     pages = {4--10},
     publisher = {mathdoc},
     volume = {205},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1994_205_a1/}
}