Rafael H. Bordini Mehdi Dastani Jürgen Dix Amal El Fallah-Seghrouchni Programming Multi-Agent Systems, 4th International Workshop, ProMAS 2006, Hakodate, Japan, May 9, 2006, Revised and Invited Papers ProMAS Lecture Notes in Computer Science 4411 Springer 2007 978-3-540-71955-7 db/conf/promas/promas2006.html