@Article{ DelGenSar13, author = { Della Rocchetta, Chiara and Gentili, Graziano and Sarfatti, Giulia }, title = { A Bloch-Landau theorem for slice regular functions }, journal = { Springer INdAM Ser. (Advances in hypercomplex analysis) }, year = { 2013 }, doi = { 10.1007/978-88-470-2445-8_4 }, volume = { 1 }, pages = { 55-74 }, URL = { https://gecogedi.dimai.unifi.it/paper/173/ }, note = { cvgmt preprint} }