@article{DAN_1984_279_6_a18,
     author = {V. S. Popov},
     title = {Rapidly converging perturbation theory},
     journal = {Doklady Akademii Nauk},
     pages = {1362--1367},
     publisher = {mathdoc},
     volume = {279},
     number = {6},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_279_6_a18/}
}