@article{MOMA_1987__103_178321,
     author = {Michael Oberguggenberger},
     title = {Generalized {Solutions} to {Semilinear} {Hyperbolic} {Systems.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {133--144},
     publisher = {mathdoc},
     volume = {103},
     year = {1987},
     zbl = {0615.35054},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1987__103_178321/}
}