%0 Journal Article %A Prabaharan, K. %T Existence of Invariant Weak Units in Banach Lattices: Countably Generated Left Amenable Semigroup of Operators %J Canadian journal of mathematics %D 1993 %P 1299-1312 %V 45 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1993-073-1/ %R 10.4153/CJM-1993-073-1 %F 10_4153_CJM_1993_073_1