FASTAXON: A System for FAST (and Faceted) TAXONomy Design. - Yannis Tzitzikas; Raimo Launonen; Mika Hakkarainen; Pekka Korhonen; Tero Leppänen; Esko Simpanen; Hannu Törnroos; Pekka Uusitalo; Pentti Vänskä (ER, 2004)