@article{JRAM_1982__337_152482,
     author = {Wolf von Wahl and Changping Chen},
     title = {Das {Rand-Anfangswertproblem} f\"ur quasilineare {Wellengleichungen} in {Sobolevr\"aumen} niedriger {Ordnung.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {77--112},
     publisher = {mathdoc},
     volume = {337},
     year = {1982},
     zbl = {0486.35053},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1982__337_152482/}
}