Defining Operational Logics

@Conference{digra490, title ="Defining Operational Logics", year = "2009", author = "Wardrip-Fruin, Noah and Mateas, Michael", publisher = "DiGRA", address = "Tampere", howpublished = "\url{https://dl.digra.org/index.php/dl/article/view/490}", booktitle = "Proceedings of DiGRA 2009 Conference: Breaking New Ground: Innovation in Games, Play, Practice and Theory"}