@Article{ 
  delc,
  author = { De Lellis, Camillo },
  title = { Blow--up of the BV norm in the multidimensional Keyfitz and Kranzer system },
  journal = { Duke Math. J. },
  year = { 2004 },
  volume = { 127 },
  number = { 2 },
  pages = { 313-339 },
  URL = { http://cvgmt.sns.it/paper/598/ },
  note = { cvgmt preprint}
}