Manuel García Vega Miguel Angel García Cumbreras Luis Alfonso Ureña López José M. Perea-Ortega Francisco Javier Ariza-López Óscar Ferrández Antonio Toral Zornitsa Kozareva Elisa Noguera Andrés Montoyo Rafael Muñoz Davide Buscaldi Paolo Rosso R2D2 at GeoCLEF 2006: A Combined Approach. 918-925 2006 conf/clef/2006 CLEF http://dx.doi.org/10.1007/978-3-540-74999-8_117 db/conf/clef/clef2006.html#VegaCLPAFTKNMMBR06