@inproceedings{KR-1991-Gardenfors,
	author        = "Peter Gärdenfors",
	booktitle     = "{Proceedings of the Second International Conference on Principles of Knowledge Representation and Reasoning}",
	isbn          = "1-55860-165-1",
	pages         = "585--590",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Nonmonotonic Inferences Based on Expectations: A Preliminary Report}",
	year          = 1991,
}