@article{AA_1991_3_2_a4,
     author = {J. Cohen and S. Yu. Slavyanov},
     title = {Quasiclassical asymptotics of the spectrum for lower states of an anharmonic oscillator},
     journal = {Algebra i analiz},
     pages = {132--138},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1991_3_2_a4/}
}