%0 Journal Article %A L. F. Barannik %A P. M. Gudivok %T Projective representations of finite groups over number rings %J Sbornik. Mathematics %D 1970 %P 391-410 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1970_11_3_a6/ %G en %F SM_1970_11_3_a6