@Misc{ 
  Man16,
  author = { Mantegazza, Carlo },
  title = { On the Minimality of the Potential Function of a Gradient Shrinking Ricci Soliton },
  journal = {  },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3170/ },
  note = { cvgmt preprint}
}