@Misc{ 
  BonBut16,
  author = { Bongini, Mattia and Buttazzo, Giuseppe },
  title = { Optimal Control Problems in Transport Dynamics },
  journal = {  },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3179/ },
  note = { cvgmt preprint}
}