@misc{sime2020automaticweakimpositionfree,
      title={Automatic weak imposition of free slip boundary conditions via Nitsche's method: application to nonlinear problems in geodynamics}, 
      author={Nathan Sime and Cian R. Wilson},
      year={2020},
      eprint={2001.10639},
      archivePrefix={arXiv},
      primaryClass={cs.CE},
      doi={10.48550/arXiv.2001.10639}
}

@article{Knobloch2000,
author={Knobloch, Petr},
title={A finite element convergence analysis for 3D Stokes equations in case of variational crimes},
journal={Applications of Mathematics},
year={2000},
month={Apr},
day={01},
volume={45},
number={2},
pages={99-129},
issn={1572-9109},
doi={10.1023/A:1022235512626},
}