Trends in Practical Applications of Agents and Multiagent Systems 8th International Conference on Practical Applications of Agents and Multiagent Systems - Demazeau, Yves; Dignum, Frank; Corchado, Juan M.; Bajo, Javier; Corchuelo, Rafael; Corchado, Emilio; Fernández-Riverola, Florentino; Julián, Vicente J.; Pawlewski, Pawel; Campbell, Andrew (Springer Berlin Heidelberg, 2010)