@Article{	  DAngeliRW2017decidability,
  author	= "Daniele D'Angeli and Emanuele Rodaro and W{\"a}chter, Jan
		  Philipp",
  title		= "Automaton Semigroups and Groups: on the Undecidability of
		  Problems Related to Freeness and Finiteness",
  journal	= "ArXiv e-prints",
  volume	= "abs/1712.07408",
  note		= "To appear in Israel Journal of Mathematics",
  year		= "2017",
  url		= "http://arxiv.org/abs/1712.07408"
}