@article{RM_1977_32_6_a0,
     author = {N. N. Nekhoroshev},
     title = {An exponential estimate of the time of stability of nearly-integrable {Hamiltonian} systems},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--65},
     publisher = {mathdoc},
     volume = {32},
     number = {6},
     year = {1977},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1977_32_6_a0/}
}