@Article{ 
  GalGonSab15a,
  author = { Gal, Sorin Gheorghe and González-Cervantes, José Óscar and Sabadini, Irene },
  title = { On some geometric properties of slice regular functions of a quaternion variable },
  journal = { Complex Var. Elliptic Equ. },
  year = { 2015 },
  doi = { 10.1080/17476933.2015.1024670 },
  volume = { 60 },
  number = { 10 },
  pages = { 1431-1455 },
  URL = { https://gecogedi.dimai.unifi.it/paper/137/ },
  note = { cvgmt preprint}
}