@Misc{ 
  figjui,
  author = { Figalli, Alessio and Juillet, Nicolas },
  title = { Absolute continuity of Wasserstein geodesics in the Heisenberg group },
  journal = { J. Funct. Anal. },
  year = { 2008 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/178/ },
  note = { cvgmt preprint}
}