@inproceedings{HIMI-MTT-2007-IshizuGNI,
	author        = "Syohei Ishizu and Andreas Gehrmann and Yoshimitsu Nagai and Yusei Inukai",
	booktitle     = "{Proceedings of the Symposium on Human Interface and the Management of Information. Part I: Methods, Techniques and Tools in Information Design}",
	doi           = "10.1007/978-3-540-73345-4_52",
	isbn          = "978-3-540-73344-7",
	pages         = "456--462",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Rough Ontology: Extension of Ontologies by Rough Sets}",
	volume        = 4557,
	year          = 2007,
}