@Misc{ 
  DeL24,
  author = { De Lellis, Camillo },
  title = { Caffarelli's work on elliptic free boundary problems },
  journal = {  },
  year = { 2024 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6733/ },
  note = { cvgmt preprint}
}