@inproceedings{SAC-2006-Savinov,
	author        = "Alexandr A. Savinov",
	booktitle     = "{Proceedings of the 21st Symposium on Applied Computing}",
	doi           = "10.1145/1141277.1141390",
	editor        = "Hisham Haddad",
	isbn          = "1-59593-108-2",
	pages         = "482--486",
	publisher     = "{ACM}",
	title         = "{Grouping and aggregation in the concept-oriented data model}",
	year          = 2006,
}