@Article{ 
  CatManMaz12,
  author = { Catino, Giovanni and Mantegazza, Carlo and Mazzieri, Lorenzo },
  title = { A Note on Codazzi Tensors },
  journal = { Math. Ann. },
  year = { 2015 },
  volume = { 362 },
  number = { 1-2 },
  pages = { 629-638 },
  URL = { http://cvgmt.sns.it/paper/1838/ },
  note = { cvgmt preprint}
}