%0 Journal Article %A H.E. Scheiblich %A C.Moore. Kayran %T TX is absolutely closed. %J Semigroup forum %D 1974 %P 216-226 %V 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1974__6_133976/ %G en %F SF_1974__6_133976