@article{MZ_1975__142_172188,
     author = {Wolf von Wahl},
     title = {Regular {Solutions} of {Initial-Boundary} {Value-Problems} for {Linear} and {Nonlinear} {Wave-Equations.} {II.}},
     journal = {Mathematische Zeitschrift},
     pages = {121--130},
     publisher = {mathdoc},
     volume = {142},
     year = {1975},
     zbl = {0301.35063},
     url = {http://geodesic.mathdoc.fr/item/MZ_1975__142_172188/}
}