Álvaro Herrero Aitor Mata Emilio Corchado Lourdes Sáiz Bárcena A Hybrid Solution for Advice in the Knowledge Management Field. 157-168 2009 HAIS http://dx.doi.org/10.1007/978-3-642-02319-4_19 conf/hais/2009 db/conf/hais/hais2009.html#HerreroMCB09