@inproceedings{ILPS-1993-SudarshanSRB,
	author        = "S. Sudarshan and Divesh Srivastava and Raghu Ramakrishnan and Catriel Beeri",
	booktitle     = "{Proceedings of the International Symposium on Logic Programming}",
	isbn          = "0-262-63152-0",
	pages         = "590--608",
	publisher     = "{MIT Press}",
	title         = "{Extending the Well-Founded and Valid Semantics for Aggregation}",
	year          = 1993,
}