@article{huang2021hackerrank,
  title={HackerRank: Identifying key hackers in underground forums},
  author={Huang, Cheng and Guo, Yongyan and Guo, Wenbo and Li, Ying},
  journal={International Journal of Distributed Sensor Networks},
  volume={17},
  number={5},
  pages={15501477211015145},
  year={2021},
  publisher={SAGE Publications Sage UK: London, England}
}