1. Angeletou, S., Sabou, M., & Motta, E. (2008, June 2). Semantically enriching folksonomies with FLOR. Proceedings of the CIS Web Workshop at the 5th European Semantic Web Conference ESWC 2008, Tenerife, Spain. Retrieved from http://oro.open.ac.uk/23497/
2. Decisions 2.0: The power of collective intelligence. MIT;E.Bonabeau;Sloan Management Review,2009
3. Prefix Tag Clouds
4. Cattuto, C., Baldassarri, A., Servedio, V., & Loreto, V. (2007). Vocabulary growth in collaborative tagging systems. Arxiv e-print.