@inproceedings{KR-2006-HalpernR,
	author        = "Joseph Y. Halpern and Leandro Chaves Rêgo",
	booktitle     = "{Proceedings of the 10th International Conference on Principles of Knowledge Representation and Reasoning}",
	ee            = "http://www.aaai.org/Library/KR/2006/kr06-004.php",
	isbn          = "978-1-57735-271-6",
	pages         = "6--13",
	publisher     = "{AAAI Press}",
	title         = "{Reasoning about Knowledge of Unawareness}",
	year          = 2006,
}