@inproceedings{KR-1992-Val,
	author        = "Alvaro del Val",
	booktitle     = "{Proceedings of the Third International Conference on Principles of Knowledge Representation and Reasoning}",
	isbn          = "1-55860-262-3",
	pages         = "740--750",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Computing Knowledge Base Updates}",
	year          = 1992,
}