@Misc{ 
  LamPie16,
  author = { Lamboley, Jimmy and Pierre, Michel },
  title = { Regularity of Optimal Spectral domains },
  journal = {  },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3078/ },
  note = { cvgmt preprint}
}