Braa, J., Sørgaard, P., Holmes, P.
, Mogensen, P. H., Kyng, M., Thüring, M. & Robinson, S. (1993).
EuroCODE deliverable: D-1.2: Requirements for EuroCODE Systems.
Markussen, R., Mogensen, P. H., Bødker, S., Christiansen, E., Ehn, P. & Trigg, R. (1993).
The AT project. Practical Research in Cooperative Design. I
The AT Project (Bind DAIMI PB-454,). Department of Computer Science, University of Aarhus.