@article{FAA_1971_5_4_a16,
     author = {N. N. Nekhoroshev},
     title = {Behavior of {Hamiltonian} systems close to integrable},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {82--83},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1971_5_4_a16/}
}