%0 Journal Article %A Ralph deLaubenfels %T Integrated Semigroups and Integrodifferential Equations. %J Mathematische Zeitschrift %D 1990 %P 501-514 %V 204 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1990__204_3_183786/ %F MZ_1990__204_3_183786