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@article{IM2_1968_2_5_a4, author = {D. Ya. Petrina}, title = {On summation of the contributions from the {Feynman} diagrams. {An}}, journal = {Izvestiya. Mathematics }, pages = {1005--1025}, publisher = {mathdoc}, volume = {2}, number = {5}, year = {1968}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IM2_1968_2_5_a4/} }
D. Ya. Petrina. On summation of the contributions from the Feynman diagrams. An. Izvestiya. Mathematics , Tome 2 (1968) no. 5, pp. 1005-1025. http://geodesic.mathdoc.fr/item/IM2_1968_2_5_a4/