@article{TMF_1981_47_3_a1,
     author = {\`E. P. Osipov},
     title = {Feynman integral for exponential interaction in four-dimensional {space-time.~I}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {307--314},
     publisher = {mathdoc},
     volume = {47},
     number = {3},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1981_47_3_a1/}
}