@article{TMF_1989_79_3_a2,
     author = {A. A. Slavnov},
     title = {Unitarity condition in~covariant quantum field theory with indefinite metric},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {347--358},
     publisher = {mathdoc},
     volume = {79},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1989_79_3_a2/}
}