@Article{ 
  focgel,
  author = { Focardi, Matteo and Gelli, Maria Stella },
  title = { Asymptotic analysis of Mumford-Shah type energies in periodically perforated domains },
  journal = { Inter. Free Boundaries },
  year = { 2007 },
  volume = { 9 },
  pages = { 107-132 },
  URL = { http://cvgmt.sns.it/paper/1619/ },
  note = { cvgmt preprint}
}