@article{INTF_1985_2_a8,
     author = {Ya. G. Sinai},
     title = {Ergodic theory of smooth dynamical systems. {Chapter~6.} {Randomness} of smooth dynamical systems. {Elements} of {KAM} theory},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Fundamental'nye Napravleniya },
     pages = {115--122},
     publisher = {mathdoc},
     volume = {2},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTF_1985_2_a8/}
}