Roberta Lima-Gomes Guillermo de Jesús Hoyos-Rivera Jean-Pierre Courtiat Regarding the Integration of Collaborative Applications into Virtual Worlds. 16-17 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2889&spage=16 2003 conf/otm/2003 OTM Workshops db/conf/otm/otm2003.html#GomesHC03