@inproceedings{CSL-2013-BerkholzKV,
	author        = "Christoph Berkholz and Andreas Krebs and Oleg Verbitsky",
	booktitle     = "{Proceedings of the Annual Conference on Computer Science Logic}",
	doi           = "10.4230/LIPIcs.CSL.2013.61",
	isbn          = "978-3-939897-60-6",
	pages         = "61--80",
	publisher     = "{Schloss Dagstuhl — Leibniz-Zentrum für Informatik}",
	series        = "{Leibniz International Proceedings in Informatics}",
	title         = "{Bounds for the quantifier depth in finite-variable logics: Alternation hierarchy}",
	volume        = 23,
	year          = 2013,
}