A comparison of techniques for estimating IDF values to generate lexical signatures for the web.

Martin Klein Michael L. Nelson A comparison of techniques for estimating IDF values to generate lexical signatures for the web. 39-46 2008 WIDM http://doi.acm.org/10.1145/1458502.1458510 conf/widm/2008 db/conf/widm/widm2008.html#KleinN08