@Misc{ 
  GigPasSou18,
  author = { Gigli, Nicola and Pasqualetto, Enrico and Soultanis, Elefterios },
  title = { Differential of metric valued Sobolev maps },
  journal = {  },
  year = { 2018 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3985/ },
  note = { cvgmt preprint}
}