Article (wu07)
Wu, F. & Huberman, B. A.
Novelty and collective attention
Proc. Natl. Acad. Sci. USA, 2007, 104, 17599-17601

Article (adamic02zipf)
Adamic, L. A. & Huberman, B. A.
Zipf's Law and the Internet
Glottometrics, 2002, 3, 143-150