@Misc{ 
  foc01,
  author = { Focardi, Matteo },
  title = { Variational Approximation of Vectorial Free Discontinuity Problems: the Discrete and Continuous Case },
  journal = {  },
  year = { 2002 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/337/ },
  note = { cvgmt preprint}
}