@misc{HallerDintelmannKaiserRehberg2008, author = {Robert Haller-Dintelmann and Hans-Christoph Kaiser and Joachim Rehberg}, title = {Elliptic model problems including mixed boundary conditions and material heterogeneities}, institution = {Weierstraß-Institut f{\"u}r Angewandte Analysis und Stochastik (WIAS)}, type = {preprintmatheon}, year = {2008}, }