2005

Newman, M. E. J. (2005), 'Power laws, Pareto distributions and Zipf's law', Contemporary Physics 46 , 323 .

2002

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

Adamic, L. (2002), 'Zipf, Power-laws, and Pareto -- a ranking tutorial ' , http://www.hpl.hp.com/research/idl/papers/ranking/ranking.html .