@conference {1502,
	title = {Breaking New Ground: Innovation in Games, Play, Practice and Theory - Proceedings of DiGRA 2009},
	booktitle = {Playability and player experience research},
	year = {2009},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84873377564\&partnerID=MN8TOARS},
	author = {Nacke, L.E. and Drachen, A. and Kuikkaniemi, K. and Niesenhaus, J. and Korhonen, H.J.}
}
