@Misc{ 
  ambgigsav03,
  author = { Ambrosio, Luigi and Gigli, Nicola and Savaré, Giuseppe },
  title = { Gradient flows with metric and differentiable structures, and applications to the Wasserstein space },
  journal = {  },
  year = { 2003 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/751/ },
  note = { cvgmt preprint}
}