@article{TMF_2009_160_3_a4,
     author = {A. Yu. Anikin},
     title = {Quantum {Birkhoff} normal forms},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {487--506},
     publisher = {mathdoc},
     volume = {160},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2009_160_3_a4/}
}