%0 Journal Article %A Garba, G.U. %T On the nilpotent rank of partial transformation semigroups. %J Portugaliae mathematica %D 1994 %P 163-172 %V 51 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1994__51_2_47090/ %G en %F PORMA_1994__51_2_47090