@Misc{ 
  PinSpeCap19,
  author = { Capolli, Marco and Pinamonti, Andrea and Speight, Gareth },
  title = { A $C^m$ Lusin Approximation Theorem for Horizontal Curves in the Heisenberg Group },
  journal = { Calc. Var. Partial Differential Equations },
  year = { 2021 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4440/ },
  note = { cvgmt preprint}
}