@Article{ 
  Car15,
  author = { Caroccia, Marco },
  title = { Cheeger $N$-clusters },
  journal = { Calculus of variation and PDE's },
  year = { 2015 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2612/ },
  note = { cvgmt preprint}
}