Radicchi, Filippo, Castellano, Claudio, Cecconi, Federico, Loreto, Vittorio and Parisi, Domenico Defining and identifying communities in networks. (2004). .

Li, Xin, Guo, Lei and Zhao, Yihong E.. "Tag-based Social Interest Discovery." Paper presented at the meeting of the Proceedings of the 17th International World Wide Web Conference, 2008.

Cattuto, C., Schmitz, C., Baldassarri, A., Servedio, V. D. P., Loreto, V., Hotho, A., Grahl, M. and Stumme, G.. "Network Properties of Folksonomies." AI Communications 20 , no. 4 (2007): 245 - 262.