Luís Seabra Lopes Nuno Lau Pedro Mariano Luís Mateus Rocha Progress in Artificial Intelligence, 14th Portuguese Conference on Artificial Intelligence, EPIA 2009, Aveiro, Portugal, October 12-15, 2009. Proceedings 5816 2009 http://dx.doi.org/10.1007/978-3-642-04686-5 978-3-642-04685-8 EPIA Lecture Notes in Computer Science Springer db/conf/epia/epia2009.html