@Misc{ 
  KraPelSpe19,
  author = { Krantz, Steven and Peloso, Marco and Spector, Daniel },
  title = { Some remarks on $L^1$ embeddings in the subelliptic setting },
  journal = {  },
  year = { 2019 },
  pages = { 10 pages },
  URL = { http://cvgmt.sns.it/paper/4322/ },
  note = { cvgmt preprint}
}