@Misc{ 
  ghigob09,
  author = { Ghisi, Marina and Gobbino, Massimo },
  title = { An example of global classical solution for the Perona-Malik equation },
  journal = {  },
  year = { 2009 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1177/ },
  note = { cvgmt preprint}
}