%0 Journal Article %A C.H. Houghton %T Completely 0-simple semigroups and their associated graphs and groups. %J Semigroup forum %D 1977 %P 41-68 %V 14 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1977__14_186356/ %F SF_1977__14_186356