Learning Classifier Systems 10th International Workshop, IWLCS 2006, Seattle, MA, USA, July 8, 2006 and 11th International Workshop, IWLCS 2007, London, UK, July 8, 2007, Revised Selected Papers - Bacardit, Jaume; Bernadó-Mansilla, Ester; Butz, Martin V.; Kovacs, Tim; Llorà, Xavier; Takadama, Keiki (Springer Berlin Heidelberg : Imprint: Springer, 2008)