Rida A. Bazzi Yin Ding Non-skipping Timestamps for Byzantine Data Storage Systems. 405-419 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3274&spage=405 2004 conf/wdag/2004 DISC db/conf/wdag/disc2004.html#BazziD04