@Article{ 
  Fto21,
  author = { Ftouhi, Ilias },
  title = { On the Cheeger inequality for convex sets },
  journal = { Journal of Mathematical Analysis and Applications },
  year = { 2021 },
  doi = { https://doi.org/10.1016/j.jmaa.2021.125443 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5200/ },
  note = { cvgmt preprint}
}