Geodesic
Analytic structure of~superpropagators in~the~coupling constant
Teoretičeskaâ i matematičeskaâ fizika, Tome 6 (1971) no. 1, pp. 21-27

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The analytic structure of the superpropagator in the coupling constant for particles with non-vanishing rest mass is found. An approximate formula is obtained for the superpropagator which gives a satisfactory description of its behavior at small values of the momentum and coupling constant. 
@article{TMF_1971_6_1_a1,
     author = {M. K. Volkov},
     title = {Analytic structure of~superpropagators in~the~coupling constant},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {21--27},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1971_6_1_a1/}
}
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M. K. Volkov. Analytic structure of~superpropagators in~the~coupling constant. Teoretičeskaâ i matematičeskaâ fizika, Tome 6 (1971) no. 1, pp. 21-27. http://geodesic.mathdoc.fr/item/TMF_1971_6_1_a1/