@Article{ 
  CatMasMon16,
  author = { Catino, Giovanni and Mastrolia, Paolo and Monticelli, Dario Daniele },
  title = { Gradient Ricci solitons with vanishing conditions on Weyl },
  journal = { J. Math. Pures Appl. },
  year = { 2017 },
  volume = { 108 },
  number = { 1 },
  pages = { 1-13 },
  URL = { http://cvgmt.sns.it/paper/2921/ },
  note = { cvgmt preprint}
}