@article{MZ_1992__210_1_174410,
     author = {Joachim Escher},
     title = {Nonlinear elliptic systems with dynamic boundary conditions.},
     journal = {Mathematische Zeitschrift},
     pages = {413--440},
     publisher = {mathdoc},
     volume = {210},
     number = {1},
     year = {1992},
     zbl = {0759.35025},
     url = {http://geodesic.mathdoc.fr/item/MZ_1992__210_1_174410/}
}