@Article{ 
  GhiMorPer14,
  author = { Ghiloni, Alessandro and Moretti, Valter and Perotti, Alessandro },
  title = { Spectral properties of compact normal quaternionic operators },
  journal = { Trends Math. (Hypercomplex Analysis: New Perspectives and Applications) },
  year = { 2014 },
  doi = { 10.1007/978-3-319-08771-9_9 },
  pages = { 133-143 },
  URL = { https://gecogedi.dimai.unifi.it/paper/107/ },
  note = { cvgmt preprint}
}