@article{TMF_1973_17_3_a7,
     author = {V. V. Babikov and G. V. Grusha and R. M. Mir-Kassimov and N. B. Shul'gina},
     title = {Lativistic variable phase method},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {391--406},
     year = {1973},
     volume = {17},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1973_17_3_a7/}
}