@inproceedings{ICLP-2005-Ray,
	author        = "Oliver Ray",
	booktitle     = "{Proceedings of the 21st International Conference on Logic Programming}",
	doi           = "10.1007/11562931_33",
	isbn          = "3-540-29208-X",
	pages         = "410--411",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{The Need for Ancestor Resolution When Answering Queries in Horn Clause Logic}",
	volume        = 3668,
	year          = 2005,
}