@article{nei1979,
  title={Mathematical model for studying genetic variation in terms of restriction endonucleases.},
  author={M Nei and Wen‐Hsiung Li},
  year={1979},
  journal={Proceedings of the National Academy of Sciences},
  doi={10.1073/pnas.76.10.5269},
  url={https://doi.org/10.1073/pnas.76.10.5269}
}