Geodesic
A~method of describing nonrenormalizable interactions, taking account of unitarity
Teoretičeskaâ i matematičeskaâ fizika, Tome 2 (1970) no. 2, pp. 197-209

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A unitary technique is developed for the construction of a Fourier-transform for two-point Green functions in localized and nonlocalized theories with nonrenormalizable interactions. Spectral representations are found for these functions. It is shown that the functions being studied have a logarithmic branch point $g^2$ for $g^2=0$ in momentum space. Cases of scalar zero-mass and large-mass particles are considered. 
@article{TMF_1970_2_2_a3,
     author = {M. K. Volkov},
     title = {A~method of describing nonrenormalizable interactions, taking account of unitarity},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {197--209},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1970_2_2_a3/}
}
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M. K. Volkov. A~method of describing nonrenormalizable interactions, taking account of unitarity. Teoretičeskaâ i matematičeskaâ fizika, Tome 2 (1970) no. 2, pp. 197-209. http://geodesic.mathdoc.fr/item/TMF_1970_2_2_a3/