@misc{okeeffe2020darkweb,
  title={The darkweb: a social network anomaly},
  author={Kevin P. O'Keeffe and Virgil Griffith and Yang Xu and Paolo Santi and Carlo Ratti},
  year={2020},
  eprint={2005.14023},
  archivePrefix={arXiv},
  primaryClass={physics.soc-ph},
  url={https://arxiv.org/abs/2005.14023}
}