%0 Journal Article %A Gomes, Gracinda M.S. %A Howie, John M. %T A -theorem for inverse semigroups with zero. %J Portugaliae mathematica %D 1996 %P 257-278 %V 53 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1996__53_3_47592/ %G en %F PORMA_1996__53_3_47592