@inproceedings{PODS-2006-GyssensPGF,
	author        = "Marc Gyssens and Jan Paredaens and Dirk Van Gucht and George H. L. Fletcher",
	booktitle     = "{Proceedings of the 25th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1142351.1142397",
	isbn          = "1-59593-318-2",
	pages         = "318--327",
	publisher     = "{ACM}",
	title         = "{Structural characterizations of the semantics of XPath as navigation tool on a document}",
	year          = 2006,
}