@article{Haitao-Sci/Reports,
  title={Route-dependent switch between hierarchical and egalitarian strategies in pigeon flocks},
  author={ Hai-Tao, Zhang and Zhiyong, Chen and  Vicsek, Tam{\'a}s  and  Guanjun, Feng and Longsheng, Sun and Riqi Su and Zhou, Tao},
  journal={Scientific Reports},
  volume={4},
  number={Article number 5805},
  pages={},
  year={2014},
}