@Misc{ 
  HenMic22,
  author = { Henrot, Antoine and Michetti, Marco },
  title = { Optimal bounds for Neumann eigenvalues in terms of the diameter },
  journal = {  },
  year = { 2022 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5808/ },
  note = { cvgmt preprint}
}