Hania Gajewska Mark S. Manasse David D. Redell Argohalls: Adding Support for Group Awareness to the Argo Telecollaboration System. 157-158 1995 ACM Symposium on User Interface Software and Technology http://doi.acm.org/10.1145/215585.219090 db/conf/uist/uist1995.html#GajewskaMR95