@Misc{ 
  BucFra17,
  author = { Bucur, Dorin and Fragalà, Ilaria },
  title = { On the honeycomb conjecture for Robin Laplacian eigenvalues },
  journal = {  },
  year = { 2017 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3472/ },
  note = { cvgmt preprint}
}