%0 Journal Article %A Warnecke, Gerald %T The homogeneous Dirichlet problem for non-elliptic partial differential equations with strong nonlinearities %J Commentationes Mathematicae Universitatis Carolinae %D 1989 %P 327-346 %V 30 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1989__30_2_a14/ %G en %F CMUC_1989__30_2_a14