@article{TMF_2014_181_2_a5,
     author = {V. A. Franke and V. Tcendrovskii},
     title = {Alternative descriptions of physical systems based on perturbation theory},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {322--336},
     publisher = {mathdoc},
     volume = {181},
     number = {2},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2014_181_2_a5/}
}