@article{MZM_2004_75_3_a14,
     author = {A. Pechen},
     title = {On an {Asymptotic} {Expansion} in {Quantum} {Theory}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {459--461},
     year = {2004},
     volume = {75},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2004_75_3_a14/}
}