%0 Journal Article %A J. Rhodes %A J. Karnofsky %T Decidability of complexity one-half for finite semigroups. %J Semigroup forum %D 1982 %P 55-66 %V 24 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1982__24_134535/ %F SF_1982__24_134535