Ugo Montanari Donald Sannella Roberto Bruni Trustworthy Global Computing, Second Symposium, TGC 2006, Lucca, Italy, November 7-9, 2006, Revised Selected Papers TGC Lecture Notes in Computer Science 4661 Springer 2007 978-3-540-75333-9 db/conf/tgc/tgc2006.html