@inproceedings{DiGRA-2009-Wardrip-FruinM,
	author        = "Noah Wardrip-Fruin and Michael Mateas",
	booktitle     = "{Proceedings of the Fifth DiGRA International Conference: Breaking New Ground: Innovation in Games, Play, Practice and Theory}",
	ee            = "http://www.digra.org/digital-library/publications/defining-operational-logics/",
	publisher     = "{Digital Games Research Association}",
	title         = "{Defining Operational Logics}",
	year          = 2009,
}