@article{TMF_1991_89_2_a6,
     author = {N. A. Boikova and V. V. Dvoeglazov and Yu. N. Tyukhtyaev and R. N. Faustov},
     title = {Quasipotential in the fourth order of perturbation theory and infrared singularities},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {228--237},
     publisher = {mathdoc},
     volume = {89},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1991_89_2_a6/}
}