@inproceedings{SIGMOD-2007-ZhouLFL,
	author        = "Jingren Zhou and Per-Åke Larson and Johann Christoph Freytag and Wolfgang Lehner",
	booktitle     = "{Proceedings of the 25th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1247480.1247540",
	isbn          = "978-1-59593-686-8",
	pages         = "533--544",
	publisher     = "{ACM}",
	title         = "{Efficient exploitation of similar subexpressions for query processing}",
	year          = 2007,
}