Geodesic
On the removal of cutoffs in the $S$-matrix
Teoretičeskaâ i matematičeskaâ fizika, Tome 18 (1974) no. 2, pp. 161-173

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Bogolyubov's $R$-operation is studied for $H_{\operatorname{int}}=\lambda:\varphi^4(x):$, where $\varphi(x)$ is a generalized free field with space-like regularization. It is shown that the coefficient functions of the perturbation series for the $S$-matrix tend to their renormalized values when the cutoffs are removed. 
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     author = {V. A. Shcherbina},
     title = {On the removal of cutoffs in the $S$-matrix},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     volume = {18},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1974_18_2_a1/}
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V. A. Shcherbina. On the removal of cutoffs in the $S$-matrix. Teoretičeskaâ i matematičeskaâ fizika, Tome 18 (1974) no. 2, pp. 161-173. http://geodesic.mathdoc.fr/item/TMF_1974_18_2_a1/