@article{LubkollSchielaWeiser2017, author = {Lars Lubkoll and Anton Schiela and Martin Weiser}, title = {An affine covariant composite step method for optimization with PDEs as equality constraints}, journal = {Optimization Methods and Software}, volume = {32}, number = {5}, pages = {1132 -- 1161}, doi = {10.1080/10556788.2016.1241783}, year = {2017}, }