@inproceedings{DLT-2004-AnselmoGM,
	author        = "Marcella Anselmo and Dora Giammarresi and Maria Madonia",
	booktitle     = "{Proceedings of the Eighth International Conference on Developments in Language Theory}",
	doi           = "10.1007/978-3-540-30550-7_6",
	isbn          = "3-540-24014-4",
	pages         = "63--75",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Regular Expressions for Two-Dimensional Languages Over One-Letter Alphabet}",
	volume        = 3340,
	year          = 2004,
}