@article{TMF_1977_30_3_a4,
     author = {I. V. Amirkhanov and G. V. Grusha and R. M. Mir-Kassimov},
     title = {Three-dimensional formulation of the relativistic two-body problem in terms of rapidities},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {333--345},
     year = {1977},
     volume = {30},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1977_30_3_a4/}
}