@article{MZM_2007_81_1_a2,
     author = {J. Br\"uning and R. V. Nekrasov and A. I. Shafarevich},
     title = {Quantization of {Periodic} {Motions} on {Compact} {Surfaces} of {Constant} {Negative} {Curvature} in a {Magnetic} {Field}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {32--42},
     publisher = {mathdoc},
     volume = {81},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2007_81_1_a2/}
}