1. Design and use of a group editor;Ellis,1989
2. Collaboration technology research at Olivetti Research Center;Lantz,1989
3. Software for interactive on-line conference;Sarin,1984
4. Beyond the chalkboard: Computer support for collaboration and problem solving in meetings;Stefik,1987
5. The Good, the Bad, and the Ugly of Window Sharing in X;Patterson,1990