@article{Friedman99,
	title = {Belief Revision: A Critique.},
	author = {Nir Friedman and Joseph Y. Halpern},
	journal = {Journal of Logic, Language and Information},
	number = {4},
	pages = {401-420},
	url = {http://dblp.uni-trier.de/db/journals/jolli/jolli8.html#FriedmanH99},
	volume = {8},
	year = {1999},
	biburl = {http://www.bibsonomy.org/bibtex/2b9559afbf790f9725f75051362380211/marciomr},
	date = {2002-01-03},
	keywords = {belief_revision impresso }
}