@article{DAN_1961_137_2_a16,
     author = {F. A. Berezin},
     title = {Canonical operator transformation in representation of secondary quantization},
     journal = {Doklady Akademii Nauk},
     pages = {311--314},
     year = {1961},
     volume = {137},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_2_a16/}
}