@inproceedings{PODS-2007-KasneciS,
	author        = "Gjergji Kasneci and Thomas Schwentick",
	booktitle     = "{Proceedings of the 26th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1265530.1265552",
	isbn          = "978-1-59593-685-1",
	pages         = "155--164",
	publisher     = "{ACM}",
	title         = "{The complexity of reasoning about pattern-based XML schemas}",
	year          = 2007,
}