@article {Mota.etal:2016,
  author = {Mota, A. and Chen, Q. and Foulk, J.W. and Ostien, J.T. and Lai, Z.},
  title = {A Cartesian parametrization for the numerical analysis of material instability},
  journal = {International Journal for Numerical Methods in Engineering},
  volume = {108},
  number = {2},
  doi = {10.1002/nme.5228},
  pages = {156--180},
  year = {2016},
  publisher={Wiley Online Library}
}