@article{DAN_1962_143_2_a11,
     author = {L. P. Shilnikov},
     title = {Some instances of generation of periodic motions in $n$-space},
     journal = {Doklady Akademii Nauk},
     pages = {289--292},
     year = {1962},
     volume = {143},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_143_2_a11/}
}