%0 Journal Article %A V. A. Babaitsev %T On some questions in the theory of $\Gamma$-extensions of algebraic number fields %J Izvestiya. Mathematics %D 1976 %P 453-462 %V 10 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1976_10_3_a1/ %G en %F IM2_1976_10_3_a1