@article{GDZPPN002426013,
title = {Nonlinear Riemann Boundary Value Problems for a Nonlinear Elliptic System in the Plane.},
journal = {Mathematische Zeitschrift},
volume = {180},
year = {1982},
pages = {241-262},
zbl = {0484.35074},
url = {http://dml.mathdoc.fr/item/GDZPPN002426013}
}
Begehr, Heinrich; Hile, Gerald N. Nonlinear Riemann Boundary Value Problems for a Nonlinear Elliptic System in the Plane.. Mathematische Zeitschrift, Tome 180 (1982) pp. 241-262. http://gdmltest.u-ga.fr/item/GDZPPN002426013/