@article{MZM_1988_44_1_a16,
     author = {A. V. Pereskokov},
     title = {Quantization rule for the nonlinear {Schr\"odinger} equation in an exterior field},
     journal = {Matemati\v{c}eskie zametki},
     pages = {149--152},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1988_44_1_a16/}
}