Geodesic
Finite-difference effects in~quantum field theory and quantization of~classical solutions
Teoretičeskaâ i matematičeskaâ fizika, Tome 82 (1990) no. 1, pp. 55-65

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The realization of the condition of Poincaré covariance on independent group variables is considered in the general case. It is shown that quantization of these variables leads to an effective theory in which finite-difference effects play the main part and the classical singularities are smoothed by the quantum fluctuations. 
@article{TMF_1990_82_1_a6,
     author = {K. A. Sveshnikov},
     title = {Finite-difference effects in~quantum field theory and quantization of~classical solutions},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {55--65},
     publisher = {mathdoc},
     volume = {82},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_82_1_a6/}
}
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K. A. Sveshnikov. Finite-difference effects in~quantum field theory and quantization of~classical solutions. Teoretičeskaâ i matematičeskaâ fizika, Tome 82 (1990) no. 1, pp. 55-65. http://geodesic.mathdoc.fr/item/TMF_1990_82_1_a6/