@Misc{ 
  Fto21a,
  author = { Ftouhi, Ilias },
  title = { Complete systems of inequalities relating the perimeter, the area and the Cheeger constant of planar domains },
  journal = { Communications in Contemporary Mathematics },
  year = { 2021 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5202/ },
  note = { cvgmt preprint}
}