@article{SchielaStoeckleinWeiser2021, author = {Anton Schiela and Matthias St{\"o}cklein and Martin Weiser}, title = {A primal dual projection algorithm for efficient constraint preconditioning}, journal = {SIAM Journal on Scientific Computing}, volume = {43}, number = {6}, pages = {A4095 -- A4120}, doi = {10.1137/20M1380739}, year = {2021}, }