@article{IM2_2013_77_1_a7,
     author = {A. V. Pereskokov},
     title = {Asymptotics of the spectrum and quantum averages of a~perturbed resonant oscillator near the boundaries of spectral clusters},
     journal = {Izvestiya. Mathematics },
     pages = {163--210},
     publisher = {mathdoc},
     volume = {77},
     number = {1},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2013_77_1_a7/}
}