@article{DAN_1973_213_4_a2,
     author = {Yu. N. Bibikov},
     title = {A sharpening of a theorem of {Moser}},
     journal = {Doklady Akademii Nauk},
     pages = {766--769},
     publisher = {mathdoc},
     volume = {213},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_213_4_a2/}
}