@inproceedings{DLT-2001-EiterGS,
	author        = "Thomas Eiter and Georg Gottlob and Thomas Schwentick",
	booktitle     = "{Revised Papers of the Fifth International Conference on Developments in Language Theory}",
	doi           = "10.1007/3-540-46011-X_4",
	isbn          = "3-540-43453-4",
	pages         = "37--56",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Second-Order Logic over Strings: Regular and Non-regular Fragments}",
	volume        = 2295,
	year          = 2001,
}