João Gama Vítor Santos Costa Alípio Mário Jorge Pavel Brazdil Discovery Science, 12th International Conference, DS 2009, Porto, Portugal, October 3-5, 2009 5808 2009 http://dx.doi.org/10.1007/978-3-642-04747-3 978-3-642-04746-6 Discovery Science Lecture Notes in Computer Science Springer db/conf/dis/dis2009.html