@article{TMF_1978_37_3_a6,
     author = {P. A. Braun},
     title = {WKB method for three-term recursion relations and quasienergies of an~anharmonic oscillator},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {355--370},
     publisher = {mathdoc},
     volume = {37},
     number = {3},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1978_37_3_a6/}
}