db/conf/cikm/LundquistGF97.html Carol Lundquist David A. Grossman Ophir Frieder Improving Relevance Feedback in the Vector Space Model. 16-23 CIKM1997/P016.pdf 1997 conf/cikm/97 CIKM http://doi.acm.org/10.1145/266714.266844 db/conf/cikm/cikm97.html#LundquistGF97