@inproceedings{PODS-1999-GrumbachRT,
	author        = "Stéphane Grumbach and Maurizio Rafanelli and Leonardo Tininini",
	booktitle     = "{Proceedings of the 18th Symposium on Principles of Database Systems}",
	cdrom         = "DiSC2_1/out/papers/pods/queryingaggregastmal.pdf",
	doi           = "10.1145/303976.303994",
	isbn          = "1-58113-062-7",
	pages         = "174--184",
	publisher     = "{ACM Press}",
	title         = "{Querying Aggregate Data}",
	year          = 1999,
}