M. Raschke, T. Schlegel, und T. Ertl. Proceedings of the International Symposium Scientific Computing for the Cognitive Sciences, Universität Heidelberg, (2010)
N. Kantola, und T. Jokela. Proceedings of the 19th Australasian conference on Computer-Human Interaction: Entertaining User Interfaces, Seite 49--56. New York, NY, USA, ACM, (2007)