@Misc{ 
  GigPas18a,
  author = { Gigli, Nicola and Pasqualetto, Enrico },
  title = { Differential structure associated to axiomatic Sobolev spaces },
  journal = {  },
  year = { 2018 },
  pages = { 14 },
  URL = { http://cvgmt.sns.it/paper/3946/ },
  note = { cvgmt preprint}
}