@article{costa2014pollution,
  title={Pollution, bad-mouthing, and local marketing: The underground of location-based social networks},
  author={Costa, Helen and Merschmann, Luiz HC and Barth, Fabr{\'\i}cio and Benevenuto, Fabr{\'\i}cio},
  journal={Information Sciences},
  volume={279},
  pages={123--137},
  year={2014},
  publisher={Elsevier}
}