@Misc{ 
  oudsan11,
  author = { Oudet, Edouard and Santambrogio, Filippo },
  title = { A Modica-Mortola approximation for branched transport and applications },
  journal = { Arch. Rati. Mech. An. },
  year = { 2011 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1121/ },
  note = { cvgmt preprint}
}