1. Andersen PB (1997) A theory of computer semiotics: semiotic approaches to construction and assessment of computer systems. Cambridge University Press, Cambridge/New York
2. Argyle M, Schmidt C (2002) Body language & communication: the handbook for non-verbal communication, 8th ed, vol 5. Junfermann, Paderborn
3. Badre A, Barber W (1998) Culturabilty: the merging of culture and usability. In: Proceedings of the 4th conference on human factors and the web. Basking Ridge: AT and T Labs
4. Bales RF (1950) Interaction process analysis: a method for the study of small groups. Addison-Wesley, Cambridge, MA
5. Beu A, Görner C, Koller F (1999) The VDU workstation: software development with DIN EN ISO 9241, vol 1. Beuth-Verlag, Berlin/Vienna/Zurich