@article{TMF_1981_47_2_a11,
     author = {L. A. Sakhnovich},
     title = {Asymptotic behavior of the spectrum of an~anharmonic oscillator},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {266--276},
     year = {1981},
     volume = {47},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1981_47_2_a11/}
}