@Misc{ 
  TilZuc18,
  author = { Tilli, Paolo and Zucco, Davide },
  title = { Spectral partitions for Sturm-Liouville problems },
  journal = { Proc. Roy. Soc. Edinburgh Sect. A },
  year = { 2018 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3950/ },
  note = { cvgmt preprint}
}