Carlos Vila Fernando Romero Manuel Contero Implementing Collaborative Engineering Environments Through Reference Model-Based Assessment. 79-86 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3190&spage=79 2004 conf/cdve/2004 CDVE db/conf/cdve/cdve2004.html#VilaRC04