@Misc{ 
  GigTyu19,
  author = { Gigli, Nicola and Tyulenev, Alexander },
  title = { Korevaar-Schoen's directional energy and Ambrosio's regular Lagrangian flows },
  journal = {  },
  year = { 2019 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4188/ },
  note = { cvgmt preprint}
}