@Misc{ 
  BraLinPar13,
  author = { Brasco, Lorenzo and Lindgren, Erik and Parini, Enea },
  title = { The fractional Cheeger problem },
  journal = { Interfaces Free Bound. },
  year = { 2013 },
  pages = { 34 },
  URL = { http://cvgmt.sns.it/paper/2225/ },
  note = { cvgmt preprint}
}