@inproceedings{ILPS-1994-PodelskiR,
	author        = "Andreas Podelski and Peter Van Roy",
	booktitle     = "{Proceedings of the International Symposium on Logic Programming}",
	isbn          = "0-262-52191-1",
	pages         = "359--374",
	publisher     = "{MIT Press}",
	title         = "{The Beauty and the Beast Algorithm: Quasi-Linear Incremental Tests of Entailment and Disentailment over Trees}",
	year          = 1994,
}