@article{CMUC_1989_30_2_a14,
     author = {Warnecke, Gerald},
     title = {The homogeneous {Dirichlet} problem for non-elliptic partial differential equations with strong nonlinearities},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {327--346},
     year = {1989},
     volume = {30},
     number = {2},
     mrnumber = {1014133},
     zbl = {0702.35061},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1989_30_2_a14/}
}