@Article{ 
  BarRiz19,
  author = { Barilari, Davide and Rizzi, Luca },
  title = { Bakry-Émery curvature and model spaces in sub-Riemannian geometry },
  journal = { Mathematische Annalen },
  year = { 2020 },
  doi = { 10.1007/s00208-020-01982-x },
  volume = { 377 },
  pages = { 435–482 },
  URL = { http://cvgmt.sns.it/paper/4331/ },
  note = { cvgmt preprint}
}