@inproceedings{KR-1991-GreinerO,
	author        = "Russell Greiner and Pekka Orponen",
	booktitle     = "{Proceedings of the Second International Conference on Principles of Knowledge Representation and Reasoning}",
	isbn          = "1-55860-165-1",
	pages         = "277--288",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Probably Approximately Optimal Derivation Strategies}",
	year          = 1991,
}