Roberto Teixeira Alves Myriam Regattieri Delgado Alex Alves Freitas Multi-label Hierarchical Classification of Protein Functions with Artificial Immune Systems. 1-12 2008 BSB http://dx.doi.org/10.1007/978-3-540-85557-6_1 conf/wob/2008 db/conf/wob/bsb2008.html#AlvesDF08