@inproceedings{KR-2010-Gruninger,
	author        = "Michael Grüninger",
	booktitle     = "{Proceedings of the 12th International Conference on Principles of Knowledge Representation and Reasoning}",
	ee            = "http://aaai.org/ocs/index.php/KR/KR2010/paper/view/1280",
	publisher     = "{AAAI Press}",
	title         = "{Ontologies for Dates and Duration}",
	year          = 2010,
}