@Misc{ 
  JulNicVit21a,
  author = { Julia, Antoine and Nicolussi Golo, Sebastiano and Vittone, Davide },
  title = { Lipschitz functions on submanifolds in Heisenberg groups },
  journal = { Int. Math. Res. Not. IMRN },
  year = { 2022 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5189/ },
  note = { cvgmt preprint}
}