@article{MZM_2014_95_2_a2,
     author = {Yu. N. Bibikov},
     title = {On {Stability} in {Hamiltonian} {Systems} with {Two} {Degrees} of {Freedom}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {202--208},
     publisher = {mathdoc},
     volume = {95},
     number = {2},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2014_95_2_a2/}
}