@Misc{ 
  CriDonSpi13a,
  author = { Crippa, Gianluca and Donadello, Carlotta and Spinolo, Laura Valentina },
  title = { A note on the initial-boundary value problem for continuity equations with rough coefficients },
  journal = {  },
  year = { 2013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2120/ },
  note = { cvgmt preprint}
}