Helder Araújo Ana Maria Mendonça Armando J. Pinho M. Inés Torres Pattern Recognition and Image Analysis, 4th Iberian Conference, IbPRIA 2009, Póvoa de Varzim, Portugal, June 10-12, 2009, Proceedings 5524 2009 http://dx.doi.org/10.1007/978-3-642-02172-5 978-3-642-02171-8 IbPRIA Lecture Notes in Computer Science Springer db/conf/ibpria/ibpria2009.html