%0 Journal Article %A Sizer, Walter S. %T Representations of group and semigroup actions %J Czechoslovak Mathematical Journal %D 1984 %P 84-91 %V 34 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1984.101927/ %R 10.21136/CMJ.1984.101927 %G en %F 10_21136_CMJ_1984_101927