@inproceedings{ML-1989-Knoblock,
	author        = "Craig A. Knoblock",
	booktitle     = "{Proceedings of the Sixth International Workshop on Machine Learning}",
	isbn          = "1-55860-036-1",
	pages         = "241--245",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Learning Hierarchies of Abstraction Spaces}",
	year          = 1989,
}