@inproceedings{PODS-2010-MartensNS,
	author        = "Wim Martens and Matthias Niewerth and Thomas Schwentick",
	booktitle     = "{Proceedings of the 29th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1807085.1807117",
	isbn          = "978-1-4503-0033-9",
	pages         = "239--250",
	publisher     = "{ACM}",
	title         = "{Schema design for XML repositories: complexity and tractability}",
	year          = 2010,
}