@Article{ 
  neg01,
  author = { Negri, Matteo },
  title = { A finite element approximation of the Griffith's model in fracture mechanics },
  journal = { Num. Math. },
  year = { 2003 },
  volume = { 95 },
  pages = { 653-687 },
  URL = { http://cvgmt.sns.it/paper/1082/ },
  note = { cvgmt preprint}
}