Bertelsen, O., M. Brynskov, P. Dalsgaard, O. Iversen, M. Petersen, and M. Wetterstrand. “Proceedings of the Sixth Danish Human-Computer Interaction Research Symposium.”. DAIMI Report Series, Vol. 35, no. 580, Nov. 2006, doi:10.7146/dpb.v35i580.7139.