Hector Geffner Rui Prada Isabel Machado Alexandre Nuno David Advances in Artificial Intelligence - IBERAMIA 2008, 11th Ibero-American Conference on AI, Lisbon, Portugal, October 14-17, 2008. Proceedings 5290 2008 978-3-540-88308-1 IBERAMIA Lecture Notes in Computer Science Springer db/conf/iberamia/iberamia2008.html