Cattuto, C.; Benz, D.; Hotho, A. & Stumme, G. (2008), Semantic Grounding of Tag Relatedness in Social Bookmarking Systems, in Amit P. Sheth; Steffen Staab; Mike Dean; Massimo Paolucci; Diana Maynard; Timothy W. Finin & Krishnaprasad Thirunarayan, ed., 'The Semantic Web -- ISWC 2008, Proc.Intl. Semantic Web Conference 2008' , Springer, Heidelberg , pp. 615--631 .