@inproceedings{KR-1994-GruberO,
	author        = "Thomas R. Gruber and Gregory R. Olsen",
	booktitle     = "{Proceedings of the Fourth International Conference on Principles of Knowledge Representation and Reasoning}",
	isbn          = "1-55860-328-X",
	pages         = "258--269",
	publisher     = "{Morgan Kaufmann}",
	title         = "{An Ontology for Engineering Mathematics}",
	year          = 1994,
}