@inproceedings{PODS-2005-Vansummeren,
	author        = "Stijn Vansummeren",
	booktitle     = "{Proceedings of the 24th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1065167.1065173",
	isbn          = "1-59593-062-0",
	pages         = "37--48",
	publisher     = "{ACM}",
	title         = "{Deciding well-definedness of XQuery fragments}",
	year          = 2005,
}