@Misc{ 
  cat09,
  author = { Catino, Giovanni },
  title = { Some Integral Pinching Results in Riemannian Geometry },
  journal = {  },
  year = { 2009 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1535/ },
  note = { cvgmt preprint}
}