@inproceedings{KR-2004-SuLZ,
	author        = "Kaile Su and Guanfeng Lv and Yan Zhang",
	booktitle     = "{Proceedings of the Ninth International Conference on Principles of Knowledge Representation and Reasoning}",
	ee            = "http://www.aaai.org/Library/KR/2004/kr04-060.php",
	isbn          = "1-57735-199-1",
	pages         = "576--586",
	publisher     = "{AAAI Press}",
	title         = "{Reasoning about Knowledge by Variable Forgetting}",
	year          = 2004,
}