@inproceedings{SAT-2015-TuHJ,
	author        = "Kuan-Hua Tu and Tzu-Chien Hsu and Jie-Hong R. Jiang",
	booktitle     = "{Proceedings of the 18th International Conference on Theory and Applications of Satisfiability Testing}",
	doi           = "10.1007/978-3-319-24318-4_25",
	isbn          = "978-3-319-24317-7",
	pages         = "343--359",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{QELL: QBF Reasoning with Extended Clause Learning and Levelized SAT Solving}",
	volume        = 9340,
	year          = 2015,
}