1. Marlow, C., Naaman, M., Boyd, D., Davis, M.: Ht06, tagging paper, taxonomy, flickr, academic article, to read. In: Wiil, U.K., Nürnberg, P.J., Rubart, J. (eds.) Hypertext, pp. 31–40. ACM, New York (2006)
2. Tso-Sutter, K.H.L., Marinho, L.B., Schmidt-Thieme, L.: Tag-aware recommender systems by fusion of collaborative filtering algorithms. In: Wainwright, R.L., Haddad, H. (eds.) SAC, pp. 1995–1999. ACM, New York (2008)
3. Dmitriev, P.A., Eiron, N., Fontoura, M., Shekita, E.J.: Using annotations in enterprise search. In: [19], pp. 811–817 (2006)
4. Bao, S., Xue, G.R., Wu, X., Yu, Y., Fei, B., Su, Z.: Optimizing web search using social annotations. In: [20], pp. 501–510 (2007)
5. Xu, Z., Fu, Y., Mao, J., Su, D.: Towards the semantic web: Collaborative tag suggestions. In: WWW2006: Proceedings of the Collaborative Web Tagging Workshop, Edinburgh, Scotland (2006)