@article{MZM_1989_46_4_a14,
     author = {S. A. Dovbysh},
     title = {Structure of the {Kolmogorov} set near separatrices of a two-dimensional mapping},
     journal = {Matemati\v{c}eskie zametki},
     pages = {112--114},
     publisher = {mathdoc},
     volume = {46},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1989_46_4_a14/}
}