@article{MZM_1995_58_3_a6,
     author = {V. V. Kozlov},
     title = {Integral invariants of the {Hamilton} equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {379--393},
     publisher = {mathdoc},
     volume = {58},
     number = {3},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1995_58_3_a6/}
}