@inproceedings{PODS-2003-GrahneT,
	author        = "Gösta Grahne and Alex Thomo",
	booktitle     = "{Proceedings of the 22nd Symposium on Principles of Database Systems}",
	doi           = "10.1145/773153.773165",
	isbn          = "1-58113-670-6",
	pages         = "111--122",
	publisher     = "{ACM}",
	title         = "{Query containment and rewriting using views for regular path queries under constraints}",
	year          = 2003,
}