@Article{ 
  BorMasMaz17,
  author = { Borghini, Stefano and Mascellani, Giovanni and Mazzieri, Lorenzo },
  title = { Some Sphere Theorems in Linear Potential Theory },
  journal = { Transactions of the American Mathematical Society },
  year = { 2017 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3663/ },
  note = { cvgmt preprint}
}