@Article{ 
  Fto21b,
  author = { Ftouhi, Ilias },
  title = { On a Polya's inequality for planar convex sets },
  journal = { Comptes Rendus de l’Académie des Sciences },
  year = { 2021 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5281/ },
  note = { cvgmt preprint}
}