@inproceedings{PODS-1993-HirstH,
	author        = "Tirza Hirst and David Harel",
	booktitle     = "{Proceedings of the 12th Symposium on Principles of Database Systems}",
	cdrom         = "['journals/anthology/cd1-3:PODS93/P244.PDF', 'journals/anthology/dvd1:text/1-3/PODS93/P244.PDF']",
	doi           = "10.1145/153850.153905",
	isbn          = "0-89791-593-3",
	pages         = "244--252",
	publisher     = "{ACM Press}",
	title         = "{Completeness Results for Recursive Data Bases}",
	year          = 1993,
}