Cattuto, Ciro, Schmitz, Christoph, Baldassarri, Andrea, Servedio, Vito D. P., Loreto, Vittorio, Hotho, Andreas, Grahl, Miranda, Stumme, Gerd,
Network Properties of Folksonomies, in:
AI Communications Journal, Special Issue on ``Network Analysis in Natural Sciences and Engineering''
20
4
(2007),
S. 245-262.