@Article{ 
  cagsca08b,
  author = { Cagnetti, Filippo and Scardia, Lucia },
  title = { An extension theorem in $SBV$ and an application to the homogenization of the Mumford-Shah functional in perforated domains },
  journal = { J. Math. Pures Appl. },
  year = { 2011 },
  volume = { 95 },
  pages = { 349-381 },
  URL = { http://cvgmt.sns.it/paper/862/ },
  note = { cvgmt preprint}
}