"we discovered regularities in user activity, tag frequencies, kinds of tags used, bursts of popularity in bookmarking and a remarkable stability in the relative proportions of tags within a given url. We also present a dynamical model of collaborative ta
S. Vahdati, N. Arndt, S. Auer, and C. Lange. Proceedings of 20th International Conference on Knowledge Engineering and Knowledge Management (EKAW'2016), 10024, Heidelberg, Springer Verlag, (November 2016)