@article{TMF_1991_89_2_a5,
     author = {A. A. Atanasov and E. S. Pisanova},
     title = {Perturbation theory for relativistic three-dimensional two-particle quasipotential equations},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {222--227},
     publisher = {mathdoc},
     volume = {89},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1991_89_2_a5/}
}