@article{MZ_1993__214_1_174552,
     author = {Herbert Koch},
     title = {Mixed problems for fully nonlinear hyperbolic equations.},
     journal = {Mathematische Zeitschrift},
     pages = {9--42},
     publisher = {mathdoc},
     volume = {214},
     number = {1},
     year = {1993},
     zbl = {0790.35073},
     url = {http://geodesic.mathdoc.fr/item/MZ_1993__214_1_174552/}
}