Pavan Kumar Vatturi Werner Geyer Casey Dugan Michael J. Muller Beth Brownholtz Tag-based filtering for personalized bookmark recommendations. 1395-1396 2008 CIKM http://doi.acm.org/10.1145/1458082.1458297 conf/cikm/2008 db/conf/cikm/cikm2008.html#VatturiGDMB08