Agent and Multi-Agent Systems. Technologies and Applications 6th KES International Conference, KES-AMSTA 2012,Dubrovnik, Croatia, June 25-27, 2012. Proceedings - Jezic, Gordan; Kusek, Mario; Nguyen, Ngoc-Thanh; Howlett, Robert J.; Jain, Lakhmi C. (Springer Berlin Heidelberg : Imprint: Springer, 2012)