@Misc{ 
  Cat14b,
  author = { Catino, Giovanni },
  title = { Some rigidity results on critical metrics for quadratic functionals },
  journal = {  },
  year = { 2014 },
  pages = {  },
  URL = { https://gecogedi.dimai.unifi.it/paper/533/ },
  note = { cvgmt preprint}
}