%0 Journal Article %A Ryotaro Sato %T On the Limit of Weighted Operator Averages. %J Mathematische Annalen %D 1973 %P 1-8 %V 203 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1973__203_162424/ %F MAN_1973__203_162424