Cédric Fournet C. A. R. Hoare Sriram K. Rajamani Jakob Rehof 242-254 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3114&spage=242 2004 conf/cav/2004 CAV db/conf/cav/cav2004.html#FournetHRR04