Ezio Berenci Claudio Carpineto Vittorio Giannini Stefano Mizzaro Effectiveness of Keyword-Based Display and Selection of Retrieval Results for Interactive Searches. 106-125 1999 conf/ercimdl/1999 ECDL http://link.springer.de/link/service/series/0558/bibs/1696/16960106.htm db/conf/ercimdl/ercimdl99.html#BerenciCGM99