@article{DAN_1961_138_2_a13,
     author = {V. A. Pliss},
     title = {The phenomenon of convergence in non-linear periodic systems},
     journal = {Doklady Akademii Nauk},
     pages = {301--304},
     publisher = {mathdoc},
     volume = {138},
     number = {2},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_138_2_a13/}
}