@inproceedings{KR-1992-NejdlB,
	author        = "Wolfgang Nejdl and Markus Banagl",
	booktitle     = "{Proceedings of the Third International Conference on Principles of Knowledge Representation and Reasoning}",
	isbn          = "1-55860-262-3",
	pages         = "697--708",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Asking About Possibilities — Revision and Update Semantics for Subjunctive Queries}",
	year          = 1992,
}