@inproceedings{PODS-2006-Cate,
	author        = "Balder ten Cate",
	booktitle     = "{Proceedings of the 25th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1142351.1142398",
	isbn          = "1-59593-318-2",
	pages         = "328--337",
	publisher     = "{ACM}",
	title         = "{The expressivity of XPath with transitive closure}",
	year          = 2006,
}