@article{TMF_1992_90_2_a4,
     author = {S. S. Stepanov and R. S. Tutik},
     title = {Expansion with respect to~$\hbar$ for bound states of the {Schr\"odinger} equation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {208--217},
     publisher = {mathdoc},
     volume = {90},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1992_90_2_a4/}
}