@inproceedings{ML-1991-LangleyA,
	author        = "Pat Langley and John A. Allen",
	booktitle     = "{Proceedings of the Eighth International Workshop on Machine Learning}",
	isbn          = "1-55860-200-3",
	pages         = "80--84",
	publisher     = "{Morgan Kaufmann}",
	title         = "{The Acquisition of Human Planning Expertise}",
	year          = 1991,
}