db/conf/cikm/Spoerri93.html Anselm Spoerri InfoCrystal: A Visual Tool for Information Retrieval & Management. 11-20 CIKM1993/P011.pdf 1993 conf/cikm/93 CIKM db/conf/cikm/cikm93.html#Spoerri93 http://doi.acm.org/10.1145/170088.170095