@article{TMF_1972_11_2_a2,
     author = {Yu. S. Tyupkin},
     title = {Adiabatic definition of the $S$-matrix when infrared divergences are present},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {162--172},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1972_11_2_a2/}
}