@Article{ 
  PanTri19,
  author = { Pansu, Pierre and Tripaldi, Francesca },
  title = { Averages and the $\ell^{q,1}$-cohomology of Heisenberg groups },
  journal = { Annales Mathematiques Blaise Pascal },
  year = { 2019 },
  volume = { 26 },
  number = { 1 },
  pages = { 81-100 },
  URL = { http://cvgmt.sns.it/paper/4691/ },
  note = { cvgmt preprint}
}