@article{DAN_1961_140_5_a7,
     author = {L. A. Nazarova},
     title = {Unimodular representations of the four group},
     journal = {Doklady Akademii Nauk},
     pages = {1011--1014},
     year = {1961},
     volume = {140},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_140_5_a7/}
}