Luigi Catuogno Pompeo Faruolo Umberto Ferraro Petrillo Ivan Visconti Reliable Accounting in Grid Economic Transactions. 514-521 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3252&spage=514 2004 conf/gcc/2004-w GCC Workshops db/conf/gcc/gcc2004-w.html#CatuognoFPV04