@article{palla2007community,
  title={Community dynamics in social networks},
  author={Palla, Gergely and Barab{\'a}si, Albert-L{\'a}szl{\'o} and Vicsek, Tam{\'a}s},
  journal={Fluctuation and Noise Letters},
  volume={7},
  number={03},
  pages={L273--L287},
  year={2007},
  publisher={World Scientific Publishing Company}
}