@Article{ DAngeliRW2018expandability, author = "Daniele D'Angeli and Emanuele Rodaro and Jan Philipp W{\"{a}}chter", title = "Orbit Expandability of Automaton Semigroups and Groups", journal = "ArXiv e-prints", volume = "abs/1812.07359", year = "2018", url = "http://arxiv.org/abs/1812.07359", archiveprefix = "arXiv", eprint = "1812.07359", timestamp = "Tue, 01 Jan 2019 15:01:25 +0100", biburl = "https://dblp.org/rec/bib/journals/arXiv eprints/abs-1812-07359", bibsource = "dblp computer science bibliography, https://dblp.org" }