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POD a-posteriori error estimates for linear-quadratic optimal control problems
Tröltzsch, F., (2009)
A regularization method for the numerical solution of elliptic boundary control problems with pointwise state constraints
Tröltzsch, Fredi, (2009)
The convergence of an interior point method for an elliptic control problem with mixed control-state constraints
Prüfert, Uwe, (2008)