Mark Aagaard A Hazards-Based Correctness Statement for Pipelined Circuits. 66-80 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2860&spage=66 2003 conf/charme/2003 CHARME db/conf/charme/charme2003.html#Aagaard03