@article{DAN_1975_221_2_a10,
     author = {A. I. Neishtadt},
     title = {Passage through a resonance in the two-frequency problem},
     journal = {Doklady Akademii Nauk},
     pages = {301--304},
     publisher = {mathdoc},
     volume = {221},
     number = {2},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_2_a10/}
}