@Misc{ 
  amblecman05,
  author = { Ambrosio, Luigi and Lecumberry, Myriam and Maniglia, Stefania },
  title = { Lipschitz regularity and approximate differentiability of the DiPerna-Lions flow },
  journal = {  },
  year = { 2005 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/681/ },
  note = { cvgmt preprint}
}