Iyad Rahwan Pavlos Moraitis Argumentation in Multi-Agent Systems, Fifth International Workshop, ArgMAS 2008, Estoril, Portugal, May 12, 2008. Revised Selected and Invited Papers 5384 2009 http://dx.doi.org/10.1007/978-3-642-00207-6 978-3-642-00206-9 ArgMAS Lecture Notes in Computer Science Springer db/conf/argmas/argmas2008.html