%0 Journal Article %A T. Xio %A J. Liang %T Analyticity of the propagators of second order linear differential equations in Banach spaces. %J Semigroup forum %D 1992 %P 356-363 %V 44 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1992__44_1_135159/ %F SF_1992__44_1_135159