@inproceedings{AFL-2011-CanoJ,
	author        = "Antonio Cano and Eija Jurvanen",
	booktitle     = "{Proceedings of the 13th International Conference on Automata and Formal Languages}",
	isbn          = "978-615-5097-19-5",
	pages         = "153--167",
	title         = "{Varieties of Languages and Frontier Check}",
	year          = 2011,
}