@Misc{ 
  San18,
  author = { Santambrogio, Filippo },
  title = { Crowd motion and evolution PDEs under density constraints },
  journal = { proceedings of the 2017 SMAI conference },
  year = { 2018 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3728/ },
  note = { cvgmt preprint}
}