@Misc{ 
  Tor22,
  author = { Tortone, Giorgio },
  title = { Liouville theorems and optimal regularity in elliptic equations },
  journal = {  },
  year = { 2022 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6269/ },
  note = { cvgmt preprint}
}