Huib Aldewereld Virginia Dignum Gauthier Picard Engineering Societies in the Agents World X, 10th International Workshop, ESAW 2009, Utrecht, The Netherlands, November 18-20, 2009. Proceedings 5881 2009 http://dx.doi.org/10.1007/978-3-642-10203-5 978-3-642-10202-8 ESAW Lecture Notes in Computer Science Springer db/conf/esaw/esaw2009.html