Wu, F. & Huberman, B. A. (2007). Novelty and collective attention. Proc. Natl. Acad. Sci. USA, 104, 17599-17601. doi: 10.1073/pnas.0704916104

Adamic, L. A. & Huberman, B. A. (2002). Zipf's Law and the Internet. Glottometrics, 3, 143-150.