@article{NanthakumarLahmerRabczuk2014,
  author    = {S.S. Nanthakumar and Tom Lahmer and Timon Rabczuk},
  title     = {Detection of multiple flaws in piezoelectric structures using XFEM and level sets},
  journal   = {Computer Methods in Applied Mechanics and Engineering},
  pages     = {98 -- 112},
  year      = {2014},
}