@Misc{ 
  CavMon16,
  author = { Cavalletti, Fabio and Mondino, Andrea },
  title = { Optimal maps in essentially non-branching spaces },
  journal = { Commun. Contemp. Math. },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3154/ },
  note = { cvgmt preprint}
}