@Article{ 
  CatManMaz13,
  author = { Catino, Giovanni and Mantegazza, Carlo and Mazzieri, Lorenzo },
  title = { Locally Conformally Flat Ancient Ricci Flows },
  journal = { Analysis & PDE },
  year = { 2015 },
  volume = { 8 },
  pages = { 365-371 },
  URL = { http://cvgmt.sns.it/paper/2221/ },
  note = { cvgmt preprint}
}