@Misc{ 
  GorVla17a,
  author = { Gori, Anna and Vlacci, Fabio },
  title = { On a criterion of local invertibility and conformality for slice regular quaternionic functions },
  journal = {  },
  year = { 2017 },
  pages = {  },
  URL = { https://gecogedi.dimai.unifi.it/paper/208/ },
  note = { cvgmt preprint}
}