Norbert A. Streitz Putting Objects to Work: Hypermedia as the Subject Matter and the Medium for Computer-Supported Cooperative Work. 183-193 http://link.springer.de/link/service/series/0558/bibs/0821/08210183.htm 1994 conf/ecoop/1994 ECOOP db/conf/ecoop/ecoop94.html#Streitz94