Michael Granitzer Wolfgang Kienreich Vedran Sabol Keith Andrews Werner Klieber Evaluating a System for Interactive Exploration of Large, Hierarchically Structured Document Repositories. 127-134 2004 conf/infovis/2004 INFOVIS http://doi.ieeecomputersociety.org/10.1109/INFOVIS.2004.19 db/conf/infovis/infovis2004.html#GranitzerKSAK04