Charles Zhang Hans-Arno Jacobsen Re-factoring Middleware Systems: A Case Study. 1243-1262 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2888&spage=1243 2003 conf/coopis/2003 CoopIS/DOA/ODBASE db/conf/coopis/coopis2003.html#ZhangJ03