@Misc{ 
  CarMésSan15,
  author = { Cardaliaguet, Pierre and Mészáros, Alpár R. and Santambrogio, Filippo },
  title = { First order Mean Field Games with density constraints: Pressure equals Price },
  journal = { SIAM J. Contr. Opt. },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2733/ },
  note = { cvgmt preprint}
}