%0 Journal Article %A Jan PrĂ¼ss %T Positivity and Regularity of Hyperbolic Volterra Equations in Banach Spaces. %J Mathematische Annalen %D 1987 %P 317-344 %V 279 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1987__279_3_164325/ %F MAN_1987__279_3_164325