A priori error estimates for the finite element discretization of optimal distributed control problems governed by the biharmonic operator Frei, Stefan Rannacher, Rolf Wollner, Winnifried 2012 - Forschungsinformationssystem der UHH
A posteriori error estimation in PDE-constrained optimization with pointwise inequality constraints Rannacher, Rolf Vexler, Boris Wollner, Winnifried 2012 - Forschungsinformationssystem der UHH