@Misc{ 
  FarMarVal13,
  author = { Farina, Alberto and Mari, Luciano and Valdinoci, Enrico },
  title = { Splitting theorems, symmetry results and overdetermined problems for Riemannian manifolds },
  journal = { Comm. in PDEs },
  year = { 2013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2175/ },
  note = { cvgmt preprint}
}