@Article{ 
  neg,
  author = { Negri, Matteo },
  title = { Convergence analysis for a smeared crack approach in brittle fracture },
  journal = { Interfaces Free Bound.  },
  year = { 2007 },
  volume = { 9 },
  pages = { 307-330 },
  URL = { http://cvgmt.sns.it/paper/1453/ },
  note = { cvgmt preprint}
}