"This study surveyed the folksonomy as a complex network. The result indicates that the network, which is composed of the tags from the folksonomy, displays both properties of small world and scale-free."
S. Salimzadeh, G. He, and U. Gadiraju. Proceedings of the 31st ACM Conference on User Modeling, Adaptation and Personalization, page 215-227. ACM, (June 2023)