@article{vicsek1999application, title={Application of statistical mechanics to collective motion in biology}, author={Vicsek, Tam{\'a}s and Czir{\'o}k, Andr{\'a}s and Farkas, Ill{\'e}s J and Helbing, Dirk}, journal={Physica A: Statistical Mechanics and its Applications}, volume={274}, number={1}, pages={182--189}, year={1999}, publisher={North-Holland} }