Rodrigo Alfaro Héctor Allende Text Representation in Multi-label Classification: Two New Input Representations. 61-70 2011 ICANNGA (2) http://dx.doi.org/10.1007/978-3-642-20267-4_7 conf/icannga/2011-2 db/conf/icannga/icannga2011-2.html#AlfaroA11