E. Law, V. Roto, M. Hassenzahl, A. Vermeeren, and J. Kort. Proceedings of the 27th international conference on Human factors in computing systems, page 719--728. New York, NY, USA, ACM, (2009)
A. Balali Moghaddam, J. Svendsen, M. Tory, and A. Branzan Albu. Proceedings of the 2011 annual conference extended abstracts on Human factors in computing systems, page 2347--2352. New York, NY, USA, ACM, (2011)
U. Reimer, U. Heck, and S. Streit. Proceedings of the 7th International Conference on Practical Aspects of Knowledge Management, page 26--37. Berlin, Heidelberg, Springer-Verlag, (2008)