@article{DAN_1962_142_3_a10,
     author = {V. Mel'nikov},
     title = {The behaviour of the trajectories of a system which is close to an autonomous {Hamiltonian} system},
     journal = {Doklady Akademii Nauk},
     pages = {542--545},
     publisher = {mathdoc},
     volume = {142},
     number = {3},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_3_a10/}
}