Paavo Arvola Jaana Kekäläinen Marko Junkkari The effect of contextualization at different granularity levels in content-oriented xml retrieval. 1491-1492 2008 CIKM http://doi.acm.org/10.1145/1458082.1458350 conf/cikm/2008 db/conf/cikm/cikm2008.html#ArvolaKJ08