@article{TMF_1982_52_1_a5,
     author = {E. M. Serebryanyi},
     title = {The covering space method in quantum field theory},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {51--62},
     publisher = {mathdoc},
     volume = {52},
     number = {1},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1982_52_1_a5/}
}