1. Giving undo attention;Abowd;Interacting with Computers,1992
2. A test bed for user interface design;Ball,1982
3. Incremental development of user interfaces;Bass,1990
4. Transparency and awareness in a real-time groupware system;Beaudouin-Lafon,1992
5. An architecture for tailoring cooperative multi-user displays;Bentley,1992