Gräff, Andreas (1998):
The HOUCOM Framework for Collaborative Environments.
[Book]

Encarnação, José L. ; Noll, Stefan ; Macedonia, Michael R. ; Goettsch, Ammo ; Schiffner, Norbert ; Gräff, Andreas (1997):
TRADE: a transatlantic research and development environment.
pp. 2-8, IEEE Computer Society, Brussels; Tokyo; Washington, International Conference on Virtual Systems and MultiMedia. VSMM '97. Proceedings, [Conference or Workshop Item]