Ciro Cattuto Dominik Benz Andreas Hotho Gerd Stumme Semantic Grounding of Tag Relatedness in Social Bookmarking Systems. 615-631 2008 International Semantic Web Conference http://dx.doi.org/10.1007/978-3-540-88564-1_39 conf/semweb/2008 db/conf/semweb/iswc2008.html#CattutoBHS08