@Article{ 
  crijimpra08,
  author = { Crippa, Gianluca and Jimenez, Chloé and Pratelli, Aldo },
  title = { Optimum and equilibrium in a transport problem with queue penalization effect },
  journal = { Advances in Calculus of Variations },
  year = { 2009 },
  volume = { 2 },
  number = { 3 },
  pages = { 207-246 },
  URL = { http://cvgmt.sns.it/paper/512/ },
  note = { cvgmt preprint}
}