@Misc{ AltdeF17a, author = { Altavilla, Amedeo and de Fabritiis, Chiara }, title = { S-regular functions which preserve a complex slice }, journal = { Annali di Matematica Pura e Applicata }, year = { 2018 }, doi = { https://doi.org/10.1007/s10231-018-0724-1 }, volume = { 197 }, number = { 4 }, pages = { 1269--1294 }, URL = { https://gecogedi.dimai.unifi.it/paper/268/ }, note = { cvgmt preprint} }