@article{TMF_1981_47_1_a11,
     author = {V. A. Smirnov},
     title = {Singularities of feynman amplitudes in the momentum space},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {140--143},
     publisher = {mathdoc},
     volume = {47},
     number = {1},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1981_47_1_a11/}
}