1. Bojko, A.: Eye Tracking in User Experience Testing: How to Make the Most of It. Proceddings of the UPA (Usability Professionals’ Association) 2005 Conference (2005), Retrieved November 22, 2006 from
http://www.usercentric.com/UC/upa/
2. Carmichael, A.: Style Guide for the Design of Interactive Television Services for Elderly Viewers. Retrieved December 15, 2006 from
http://www.computing.dundee.ac.uk/projects/UTOPIA/publications/Carmichael%20-%20DesignStyleGuideFinal.pdf/
3. Duchowski, A.T.: Eye Tracking Methodology: Theory and Practice. Springer, London (2003)
4. Godding, T.: Eye tracking vs. Think aloud? Retrieved December 15, 2006 from
http://staff.interesource.com/priority4/october2006/eyetracking.htm/
5. Hassenzahl, M., Burmester, M., Koller, F.: AttrakDiff: Ein Fragebogen zur Messung wahrgenommener hedonischer und pragmatischer Qualität. In: Ziegler, J., Szwillus, G. (eds.) Mensch & Computer 2003. Interaktion in Bewegung, pp. 187–196. B.G. Teubner, Stuttgart (2003)