@inproceedings{SAC-2002-Norvag,
	author        = "Kjetil Nørvåg",
	booktitle     = "{Proceedings of the 17th Symposium on Applied Computing}",
	doi           = "10.1145/508791.508868",
	pages         = "402--406",
	publisher     = "{ACM}",
	title         = "{Temporal query operators in XML databases}",
	year          = 2002,
}