%0 Journal Article %A N. Levan %T A non-spectral representation of shift semigroups. %J Semigroup forum %D 1993 %P 381-388 %V 47 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1993__47_2_135288/ %F SF_1993__47_2_135288