@inproceedings{KR-2014-Libkin,
	author        = "Leonid Libkin",
	booktitle     = "{Proceedings of the 14th International Conference on Principles of Knowledge Representation and Reasoning}",
	ee            = "http://www.aaai.org/ocs/index.php/KR/KR14/paper/view/7893",
	isbn          = "978-1-57735-657-8",
	publisher     = "{AAAI Press}",
	title         = "{Certain Answers as Objects and Knowledge}",
	year          = 2014,
}