@Misc{ 
  ambmas,
  author = { Ambrosio, Luigi and Masnou, Simon },
  title = { A direct variational approach to a problem arising in image reconstruction },
  journal = { Interfaces and Free Boundaries },
  year = { 2002 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/495/ },
  note = { cvgmt preprint}
}