@Article{ 
  FigZha21,
  author = { Figalli, Alessio and Zhang, Yi Ru-Ya },
  title = { Sharp gradient stability for the Sobolev inequality },
  journal = { Duke Mathematical Journal },
  year = { 2022 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5222/ },
  note = { cvgmt preprint}
}