@article{czirok1996possible,
  title={Possible origin of power-law behavior in n-tuple Zipf analysis},
  author={Czir{\'o}k, Andr{\'a}s and Stanley, H Eugene and Vicsek, Tam{\'a}s},
  journal={Physical Review E},
  volume={53},
  number={6},
  pages={6371},
  year={1996},
  publisher={American Physical Society}
}