@Misc{ 
  SavTos12,
  author = { Savaré, Giuseppe and Toscani, Giuseppe },
  title = { The concavity of Rènyi entropy power },
  journal = {  },
  year = { 2012 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5046/ },
  note = { cvgmt preprint}
}