%0 Journal Article %A B. Forrest %T Invariant means, right ideals and the structure of semitopological semigroups.ยด %J Semigroup forum %D 1990 %P 325-362 %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1990__40_1_135029/ %F SF_1990__40_1_135029