@misc{MeyerRehbergSchiela2009, author = {Christian Meyer and Joachim Rehberg and Anton Schiela}, title = {H{\"o}lder continuity and optimal control for nonsmooth elliptic problems}, institution = {Weierstraß-Institut f{\"u}r Angewandte Analysis und Stochastik (WIAS)}, type = {preprintmatheon}, year = {2009}, }