@article{MZM_1991_49_5_a10,
     author = {N. G. Moshchevitin},
     title = {Existence and smoothness of the integral of a {Hamiltonian} system of a certain form},
     journal = {Matemati\v{c}eskie zametki},
     pages = {80--85},
     publisher = {mathdoc},
     volume = {49},
     number = {5},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_49_5_a10/}
}