Sen, Shilad ; Lam, Shyong K. ; Rashid, Al Mamunur ; Cosley, Dan ; Frankowski, Dan ; Osterhouse, Jeremy ; Harper, F. Maxwell ; Riedl, John: tagging, communities, vocabulary, evolution. In: CSCW '06: Proceedings of the 2006 20th anniversary conference on Computer supported cooperative work. New York, NY, USA : ACM, 2006. - ISBN 1-59593-249-6, S. 181--190