@Misc{ 
  brabutsan10,
  author = { Brasco, Lorenzo and Buttazzo, Giuseppe and Santambrogio, Filippo },
  title = { A Benamou-Brenier approach to branched transport },
  journal = { SIAM J. Math. Anal. },
  year = { 2010 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1425/ },
  note = { cvgmt preprint}
}