@Article{ 
  AlmChaNov11,
  author = { Almeida, Luis and Chambolle, Antonin and Novaga, Matteo },
  title = { Mean curvature flow with obstacles },
  journal = { Annales IHP - Analyse Nonlineaire },
  year = { 2012 },
  volume = { 29 },
  pages = { 667-681 },
  URL = { http://cvgmt.sns.it/paper/1691/ },
  note = { cvgmt preprint}
}