@Article{ 
  AltSar18,
  author = { Altavilla, Amedeo and Sarfatti, Giulia },
  title = { Slice-Polynomial Functions and Twistor Geometry of Ruled Surfaces in
  $\mathbb{CP}^3$ },
  journal = { Mathematische Zeitschrift },
  year = { 2019 },
  doi = { https://doi.org/10.1007/s00209-018-2225-8 },
  volume = { 291 },
  pages = {  },
  URL = { https://gecogedi.dimai.unifi.it/paper/275/ },
  note = { cvgmt preprint}
}