@Misc{ 
  SpeZim22,
  author = { Speight, Gareth and Zimmerman, Scott },
  title = { A $C^{m,\omega}$ Whitney Extension Theorem for Horizontal Curves in the Heisenberg Group },
  journal = {  },
  year = { 2022 },
  pages = { 21 },
  URL = { http://cvgmt.sns.it/paper/5500/ },
  note = { cvgmt preprint}
}