@Misc{ 
  fig09,
  author = { Figalli, Alessio },
  title = { Optimal transport, Euler equations, Mather and DiPerna-Lions theories },
  journal = {  },
  year = { 2009 },
  pages = { 53 },
  URL = { http://cvgmt.sns.it/paper/1386/ },
  note = { cvgmt preprint}
}