@inproceedings{KR-2012-TosattoBTV,
	author        = "Silvano Colombo Tosatto and Guido Boella and Leendert W. N. van der Torre and Serena Villata",
	booktitle     = "{Proceedings of the 13th International Conference on Principles of Knowledge Representation and Reasoning}",
	ee            = "http://www.aaai.org/ocs/index.php/KR/KR12/paper/view/4553",
	isbn          = "978-1-57735-560-1",
	publisher     = "{AAAI Press}",
	title         = "{Abstract Normative Systems: Semantics and Proof Theory}",
	year          = 2012,
}