@article{flack2013robustness,
  title={Robustness of flight leadership relations in pigeons},
  author={Flack, Andrea and {\'A}kos, Zsuzsa and Nagy, M{\'a}t{\'e} and Vicsek, Tam{\'a}s and Biro, Dora},
  journal={Animal Behaviour},
  volume={86},
  number={4},
  pages={723--732},
  year={2013},
  publisher={Academic Press}
}