@inproceedings{KR-1994-Williams,
	author        = "Mary-Anne Williams",
	booktitle     = "{Proceedings of the Fourth International Conference on Principles of Knowledge Representation and Reasoning}",
	isbn          = "1-55860-328-X",
	pages         = "619--629",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Transmutations of Knowledge Systems}",
	year          = 1994,
}