Tim Kovacs Xavier Llorà Keiki Takadama Pier Luca Lanzi Wolfgang Stolzmann Stewart W. Wilson Learning Classifier Systems, International Workshops, IWLCS 2003-2005, Revised Selected Papers IWLCS Lecture Notes in Computer Science 4399 Springer 2007 978-3-540-71230-5 db/conf/iwcls/iwlcs2005.html