@inproceedings{DLT-2007-DiekertK,
	author        = "Volker Diekert and Manfred Kufleitner",
	booktitle     = "{Proceedings of the 11th International Conference on Developments in Language Theory}",
	doi           = "10.1007/978-3-540-73208-2_1",
	isbn          = "978-3-540-73207-5",
	pages         = "1--19",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{On First-Order Fragments for Words and Mazurkiewicz Traces}",
	volume        = 4588,
	year          = 2007,
}