@Article{ 
  Cri18,
  author = { Crismale, Vito },
  title = { On the approximation of $SBD$ functions and some applications },
  journal = { SIAM J. Math. Anal. },
  year = { 2019 },
  doi = { 10.1137/18M119522X },
  volume = { 51 },
  number = { 6 },
  pages = { 5011-5048 },
  URL = { http://cvgmt.sns.it/paper/3892/ },
  note = { cvgmt preprint}
}