@misc{operti2017light,
  title={The light pollution as a surrogate for urban population of the US cities},
  author={Felipe G. Operti and Erneson A. Oliveira and Humberto A. Carmona and Javam C. Machado and José S. Andrade Jr},
  year={2017},
  eprint={1706.05139},
  archivePrefix={arXiv},
  primaryClass={physics.soc-ph},
  doi={10.1016/j.physa.2017.11.039},
  url={https://arxiv.org/abs/1706.05139}
}