1. Adler, P.S., Winograd, T.A. (eds.) (1992) Usability: turning technologies into tools. Oxford, UK: Oxford University Press
2. Report ISI-RR;Y Arens,1991
3. Beardon, C. (1992) The ethics of virtual reality. Intelligent Tutoring Media 3(1), 23–28
4. Benedikt, M. (ed.) (1992) Cyberspace: first steps. MIT Press
5. Bjorn-Andersen, N., Ginnerup, L. (1991) The support of cognitive capacity in future organisations: towards enhanced communicative competence and cooperative problem-structuring capability. In: Rasmussen, J., Andersen, H.B., Bersen, N.O. (eds.) Human-Computer Interaction: research directions in cognitive science, European perspectives, Vol. 3, pp. 113–151. Hillsdale, NJ: Lawrence Erlbaum Associates