@Article{ 
  focgel00,
  author = { Focardi, Matteo and Gelli, Maria Stella },
  title = { Approximation results by difference schemes of Fracture Energies: the vectorial case. },
  journal = { NoDEA },
  year = { 2003 },
  volume = { 10 },
  number = { 4 },
  pages = { 469-495 },
  URL = { http://cvgmt.sns.it/paper/668/ },
  note = { cvgmt preprint}
}