@article{DAN_1962_142_4_a2,
     author = {V. I. Arnol'd},
     title = {On the behavior of an adiabatic invariant under slow periodic variation of the {Hamiltonian}},
     journal = {Doklady Akademii Nauk},
     pages = {758--761},
     publisher = {mathdoc},
     volume = {142},
     number = {4},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_4_a2/}
}