@inproceedings{FDG-2009-JuulN,
	author        = "Jesper Juul and Marleigh Norton",
	booktitle     = "{Proceedings of the Fourth International Conference on Foundations of Digital Games}",
	doi           = "10.1145/1536513.1536539",
	isbn          = "978-1-60558-437-9",
	pages         = "107--112",
	publisher     = "{ACM}",
	title         = "{Easy to use and incredibly difficult: on the mythical border between interface and gameplay}",
	year          = 2009,
}