%0 Journal Article %T Commutative Systems of Covariance and a Generalization of Mackey's Imprimitivity Theorem %J Canadian mathematical bulletin %D 1984 %P 390-397 %V 27 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1984-060-6/ %R 10.4153/CMB-1984-060-6 %F 10_4153_CMB_1984_060_6