@Misc{ 
  AmaBelPao14,
  author = { Amato, Stefano and Bellettini, Giovanni and Paolini, Maurizio },
  title = { Constrained $BV$ functions on covering spaces for minimal networks and Plateau's type problems },
  journal = {  },
  year = { 2015 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2588/ },
  note = { cvgmt preprint}
}