Daniel Port Scott Chen Assessing COTS Assessment: How Much Is Enough? 183-198 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2959&spage=183 2004 conf/iccbss/2004 ICCBSS db/conf/iccbss/iccbss2004.html#PortC04