@article{czirok2001theory,
  title={Theory of periodic swarming of bacteria: Application to Proteus mirabilis},
  author={Czir{\'o}k, Andras and Matsushita, Mitsugu and Vicsek, Tamas},
  journal={Physical Review E},
  volume={63},
  number={3},
  pages={031915},
  year={2001},
  publisher={American Physical Society}
}