%0 Journal Article %A Ya. I. Zhitomirskii %T On~differential operators of infinite order in spaces of type~$S$ %J Sbornik. Mathematics %D 1969 %P 379-388 %V 9 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1969_9_3_a6/ %G en %F SM_1969_9_3_a6