Heikki Keskustalo Kalervo Järvelin Ari Pirkola Jaana Kekäläinen Intuition-supporting visualization of user's performance based on explicit negative higher-order relevance. 675-682 2008 SIGIR http://doi.acm.org/10.1145/1390334.1390448 conf/sigir/2008 db/conf/sigir/sigir2008.html#KeskustaloJPK08