@article{vicsek1987fractal,
  title={Fractal distribution of galaxies modeled by a cellular-automaton-type stochastic process},
  author={Vicsek, Tam{\'a}s and Szalay, Alexander S},
  journal={Physical review letters},
  volume={58},
  number={26},
  pages={2818},
  year={1987},
  publisher={American Physical Society}
}