@article{DAN_1994_334_5_a1,
     author = {A. A. Bolibrukh},
     title = {On an analytic transformation to standard {Birkhoff} form},
     journal = {Doklady Akademii Nauk},
     pages = {553--555},
     publisher = {mathdoc},
     volume = {334},
     number = {5},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_334_5_a1/}
}