@article{DE_1985_21_2_a23,
     author = {N. N. Nekhoroshev},
     title = {On a theorem of {N.\,I.~Gavrilov}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {335--338},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_2_a23/}
}