%0 Journal Article %A Crabb, M.J. %A Munn, W.D. %T On the contracted -algebra of a polycyclic monoid. %J Portugaliae mathematica %D 2006 %P 327-334 %V 63 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_2006__63_3_53131/ %G en %F PORMA_2006__63_3_53131