@inproceedings{ML-1989-Haines,
	author        = "David Haines",
	booktitle     = "{Proceedings of the Sixth International Workshop on Machine Learning}",
	isbn          = "1-55860-036-1",
	pages         = "43--45",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Explanation Based Learning as Constrained Search}",
	year          = 1989,
}