@article{MAN_1987__279_3_164325,
     author = {Jan Pr\"uss},
     title = {Positivity and {Regularity} of {Hyperbolic} {Volterra} {Equations} in {Banach} {Spaces.}},
     journal = {Mathematische Annalen},
     pages = {317--344},
     publisher = {mathdoc},
     volume = {279},
     number = {3},
     year = {1987},
     zbl = {0608.45007},
     url = {http://geodesic.mathdoc.fr/item/MAN_1987__279_3_164325/}
}