@article{MM_1997_9_1_a5,
     author = {A. D. Egorov and E. P. Zhidkov and V. A. Petrov},
     title = {Approximate formulas for functional integrals including the contributions of {Feynman} diagrams of given form},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {69--78},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1997_9_1_a5/}
}