2007

Grahl, M.; Hotho, A. & Stumme, G. (2007), Conceptual Clustering of Social Bookmarking Sites, in '7th International Conference on Knowledge Management (I-KNOW '07)' , Know-Center, Graz, Austria , pp. 356-364 .

2006

Heymann, P. & Garcia-Molina, H. (2006), 'Collaborative Creation of Communal Hierarchical Taxonomies in Social Tagging Systems' (2006-10) , Technical report, Computer Science Department .