%0 Journal Article %A Wingberg, Kay %T Duality theorems for $\Gamma $-extensions of algebraic number fields %J Compositio Mathematica %D 1985 %P 333-381 %V 55 %N 3 %I Martinus Nijhoff Publishers %U http://www.numdam.org/item/CM_1985__55_3_333_0/ %G en %F CM_1985__55_3_333_0