Jessica Rubart Weigang Wang Jörg M. Haake Supporting Cooperative Activities with Shared Hypermedia Workspaces on the WWW. 2003 WWW (Alternate Paper Tracks) http://www2003.org/cdrom/papers/alternate/P563/p563-rubart/p563-rubart.html db/conf/www/www2003at.html#RubartWH03