@inproceedings{CIAA-2000-Ibarra,
	author        = "Oscar H. Ibarra",
	booktitle     = "{Revised Papers of the Fifth International Conference on Implementation and Application of Automata}",
	doi           = "10.1007/3-540-44674-5_12",
	isbn          = "3-540-42491-1",
	pages         = "145--156",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Reachability and Safety in Queue Systems}",
	volume        = 2088,
	year          = 2000,
}