@Misc{ 
  Cap11,
  author = { Capriani, Giuseppe Maria },
  title = { The Steiner rearrangement in any codimension },
  journal = { Calc. Var. Partial Differential Equations },
  year = { 2012 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1713/ },
  note = { cvgmt preprint}
}