Haiwei Ye Brigitte Kerhervé Gregor von Bochmann Integrating Quality of Service into Database Systems. 803-812 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2736&spage=803 2003 conf/dexa/2003 DEXA db/conf/dexa/dexa2003.html#YeKB03