@Misc{ 
  Vla16a,
  author = { Vlacci, Fabio },
  title = { Vieta's formulae for regular polynomials of a quaternionic variable },
  journal = { Adv. Geom. },
  year = { 2017 },
  doi = { 10.1515/advgeom-2017-0007 },
  pages = {  },
  URL = { https://gecogedi.dimai.unifi.it/paper/149/ },
  note = { cvgmt preprint}
}