C. A. R. Hoare The Verifying Compiler: A Grand Challange for Computing Research. 25-35 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2789&spage=25 2003 conf/jmlc/2003 JMLC db/conf/jmlc/jmlc2003.html#Hoare03