@article{TMF_1987_70_2_a6,
     author = {V. B. Tverskoi},
     title = {Higher orders of perturbation theory in the neighborhood of a~classical solution},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {218--225},
     publisher = {mathdoc},
     volume = {70},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_70_2_a6/}
}