TY - JOUR AU - Alt, Walter AU - Bräutigam, Nils AU - Rösch, Arnd TI - Error estimates for finite element approximations of elliptic control problems JO - Discussiones Mathematicae. Differential Inclusions, Control and Optimization PY - 2007 SP - 7 EP - 22 VL - 27 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DMDICO_2007_27_1_a0/ LA - en ID - DMDICO_2007_27_1_a0 ER -