@inproceedings{DLT-2009-BertoniCR,
	author        = "Alberto Bertoni and Christian Choffrut and Roberto Radicioni",
	booktitle     = "{Proceedings of the 13th International Conference on Developments in Language Theory}",
	doi           = "10.1007/978-3-642-02737-6_8",
	isbn          = "978-3-642-02736-9",
	pages         = "103--112",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{The Inclusion Problem of Context-Free Languages: Some Tractable Cases}",
	volume        = 5583,
	year          = 2009,
}