@Article{ 
  lusneg06,
  author = { Lussardi, Luca and Negri, Matteo },
  title = { Convergence of non-local finite element energies for fracture mechanics },
  journal = { Numer. Funct. Anal. Optim. },
  year = { 2007 },
  volume = { 28 },
  pages = { 83-109 },
  URL = { http://cvgmt.sns.it/paper/939/ },
  note = { cvgmt preprint}
}