@Article{ 
  LemSan13,
  author = { Lemenant, Antoine and Santambrogio, Filippo },
  title = { A Modica-Mortola approximation for the Steiner Problem },
  journal = { Comptes Rendus Mathematique },
  year = { 2014 },
  volume = { 352 },
  number = { 5 },
  pages = { 451-454 },
  URL = { http://cvgmt.sns.it/paper/2278/ },
  note = { cvgmt preprint}
}