1. Shepitsen, A., Gemmell, J., Mobasher, B., Burke, R.: Personalized recommendation in social tagging systems using hierarchical clustering. In: Proceedings of the 2008 ACM Conference on Recommender Systems, pp. 259–266. ACM, New York (2008)
2. Nowell, L.D., Kleinberg, J.: The link prediction problem for social networks. In: Proceedings of the Twelfth International Conference on Information and Knowledge Management (CIKM), pp. 1019–1031. ACM, New York (2004)
3. Scellato, S., Noulas, A., Mascolo, C.: Exploiting place features in link prediction on location-based social networks. In: Proceedings of the 17th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, pp. 1046–1054. ACM, New York (2011)
4. Symeonidis, P., Tiakas, E., Manolopoulos, Y.: Transitive node similarity for link prediction in social networks with positive and negative links. In: Proceedings of the Fourth ACM Conference on Recommender Systems (RecSys 2010), pp. 183–190. ACM, New York (2010)
5. Hsu, W.H., King, A.L., Paradesi, M.S., Pydimarri, T., Weninger, T.: Collaborative and structural recommendation of friends using weblog-based social network analysis. In: AAAI Spring Symposium: Computational Approaches to Analyzing Weblogs, pp. 55–60. AAAI, Menlo Park (2006)