@inproceedings{PODS-2003-MendelzonP,
	author        = "Alberto O. Mendelzon and Ken Q. Pu",
	booktitle     = "{Proceedings of the 22nd Symposium on Principles of Database Systems}",
	doi           = "10.1145/773153.773166",
	isbn          = "1-58113-670-6",
	pages         = "123--133",
	publisher     = "{ACM}",
	title         = "{Concise descriptions of subsets of structured sets}",
	year          = 2003,
}