%0 Journal Article %A Sato, Ryotaro %T A note on operator convergence for semigroups %J Commentationes Mathematicae Universitatis Carolinae %D 1974 %P 127-129 %V 15 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1974__15_1_a10/ %G en %F CMUC_1974__15_1_a10