@inproceedings{VLDB-1995-YanL,
	author        = "Weipeng P. Yan and Per-Åke Larson",
	booktitle     = "{Proceedings of the 21st International Conference on Very Large Data Bases}",
	ee            = "http://www.vldb.org/conf/1995/P345.PDF",
	isbn          = "1-55860-379-4",
	pages         = "345--357",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Eager Aggregation and Lazy Aggregation}",
	year          = 1995,
}