Michael Benedikt Glenn Bruns On Guard: Producing Run-Time Checks from Integrity Constraints. 27-41 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3116&spage=27 2004 conf/amast/2004 AMAST db/conf/amast/amast2004.html#BenediktB04