@Article{ 
  crijimpra08a,
  author = { Crippa, Gianluca and Jimenez, Chloé and Pratelli, Aldo },
  title = { A transport problem with queue penalization effect },
  journal = { Singularities in nonlinear evolution phenomena and applications - proceedings },
  year = { 2009 },
  pages = { 139-156 },
  URL = { http://cvgmt.sns.it/paper/1426/ },
  note = { cvgmt preprint}
}