@Misc{ 
  Cav16,
  author = { Cavalletti, Fabio },
  title = { An overview of L1 optimal transportation on metric measure spaces },
  journal = {  },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3088/ },
  note = { cvgmt preprint}
}