Peter Amey Brian Dobbing High Integrity Ravenscar. 68-79 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2655&spage=68 2003 conf/adaEurope/2003 Ada-Europe db/conf/adaEurope/adaEurope2003.html#AmeyD03