@Misc{ 
  GhiRec16a,
  author = { Ghiloni, Riccardo and Recupero, Vincenzo },
  title = { Slice regular semigroups },
  journal = { arXiv:1605.01645 [math.FA] },
  year = { 2016 },
  pages = {  },
  URL = { https://gecogedi.dimai.unifi.it/paper/119/ },
  note = { cvgmt preprint}
}