1. Barrat, A., Cattuto, C., Colizza, V., Pinton, J.-F., den Broeck, W.V., Vespignani, A.: High resolution dynamical mapping of social interactions with active rfid (2008), http://arxiv.org/abs/0811.4170
2. Begelman, G., Keller, P., Smadja, F.: Automated tag clustering: Improving search and exploration in the tag space. In: Proc. 17th Int. World Wide Web Conf., Edinburgh, UK (2006)
3. Cantador, I., Szomszor, M., Alani, H., Fernändez, M., Castells, P.: Enriching ontological user profiles with tagging history for multi-domain recommendations. In: Proc. Workshop on Collective Semantics: Collective Intelligence and the Semantic Web (CISWeb 2008), in 5th ESWC, Tenerife, Spain (2008)
4. Eagle, N., (Sandy) Pentland, A.: Reality mining: sensing complex social systems. Personal Ubiquitous Comput. 10(4), 255–268 (2006)
5. Glaser, H., Millard, I., Jaffri, A.: Rkbexplorer.com:a knowledge driven infrastructure for linked data providers. In: Proc. European Semantic Web Conference, Tenerife, Spain (2008)