@Article{ 
  cridel05,
  author = { Crippa, Gianluca and De Lellis, Camillo },
  title = { Oscillatory solutions to transport equations },
  journal = { Indiana Univ. Math. J. },
  year = { 2006 },
  volume = { 55 },
  number = { 1 },
  pages = { 1-13 },
  URL = { http://cvgmt.sns.it/paper/1246/ },
  note = { cvgmt preprint}
}