2007

Jäschke, R.; Marinho, L.; Hotho, A.; Schmidt-Thieme, L. & Stumme, G. (2007), 'Tag Recommendations in Folksonomies', .

2006

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

2005

Golder, S. & Huberman, B. A. (2005), 'The Structure of Collaborative Tagging Systems', .