@Article{ 
  AmbCri13,
  author = { Ambrosio, Luigi and Crippa, Gianluca },
  title = { Continuity equations and ODE flows with non-smooth velocity },
  journal = { Proceedings of the Royal Society of Edinburgh: Section A },
  year = { 2014 },
  volume = { 144 },
  number = { 6 },
  pages = { 1191-1244 },
  URL = { http://cvgmt.sns.it/paper/2268/ },
  note = { cvgmt preprint}
}