@article{SM_1970_10_2_a0,
     author = {N. M. Kostenko},
     title = {Asymptotic behavior of the eigenvalues of an anharmonic oscillator},
     journal = {Sbornik. Mathematics},
     pages = {151--163},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1970_10_2_a0/}
}