@Article{ 
  catdjandi08,
  author = { Catino, Giovanni and Djadli, Zindine and Ndiaye, Cheikh Birahim },
  title = { A sphere theorem on locally conformally flat even-dimensional manifolds },
  journal = { Manuscripta Math. },
  year = { 2011 },
  volume = { 136 },
  pages = { 237-247 },
  URL = { http://cvgmt.sns.it/paper/323/ },
  note = { cvgmt preprint}
}