@Article{ 
  CirVez16,
  author = { Ciraolo, Giulio and Vezzoni, Luigi },
  title = { A remark on an overdetermined problem in Riemannian geometry },
  journal = { Geometric Properties for Parabolic and Elliptic PDE's },
  year = { 2016 },
  doi = { 10.1007/978-3-319-41538-3_6 },
  volume = { 176 },
  pages = { 87-96 },
  URL = { https://gecogedi.dimai.unifi.it/paper/224/ },
  note = { cvgmt preprint}
}