@article{youssef2014routing,
  title={Routing metrics of cognitive radio networks: A survey},
  author={Youssef, Moustafa and Ibrahim, Mohamed and Abdelatif, Mohamed and Chen, Lin and Vasilakos, Athanasios V},
  journal={IEEE Communications Surveys \& Tutorials},
  volume={16},
  number={1},
  pages={92--109},
  year={2014},
  publisher={IEEE}
}