@inproceedings{ICLP-2007-Nguyen,
	author        = "Linh Anh Nguyen",
	booktitle     = "{Proceedings of the 23rd International Conference on Logic Programming}",
	doi           = "10.1007/978-3-540-74610-2_35",
	isbn          = "978-3-540-74608-9",
	pages         = "438--439",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Approximating Horn Knowledge Bases in Regular Description Logics to Have PTIME Data Complexity}",
	volume        = 4670,
	year          = 2007,
}