@Misc{ 
  MonZac19,
  author = { Monti, Roberto and Zaccaron, Michele },
  title = { Height estimate and Lipschitz approximation for geodesics in Carnot groups },
  journal = {  },
  year = { 2019 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4466/ },
  note = { cvgmt preprint}
}