@article{barabsi1999,
  title={Emergence of Scaling in Random Networks},
  author={Albert-Ĺaszló Barabási and Réka Albert},
  year={1999},
  journal={Science},
  doi={10.1126/science.286.5439.509},
  url={https://doi.org/10.1126/science.286.5439.509}
}