@Article{ 
  DavUgoRob16,
  author = { Barilari, Davide and Boscain, Ugo and Neel, Robert W. },
  title = { Heat kernel asymptotics on sub-Riemannian manifolds with symmetries and applications to the bi-Heisenberg group },
  journal = { Annales de la Faculté des Sciences de Toulouse },
  year = { 2019 },
  doi = { https://doi.org/10.5802/afst.1613 },
  volume = { 28 },
  number = { 4 },
  pages = { 707-732 },
  URL = { http://cvgmt.sns.it/paper/3071/ },
  note = { cvgmt preprint}
}