@inproceedings{SAT-2004-BuningZ,
	author        = "Hans Kleine Büning and Xishun Zhao",
	booktitle     = "{Proceedings of the Seventh International Conference on Theory and Applications of Satisfiability Testing}",
	ee            = "http://www.satisfiability.org/SAT04/programme/92.pdf",
	pages         = "230--237",
	title         = "{Equivalence Models for Quantified Boolean Formulas}",
	year          = 2004,
}