@article{physicallayersecurityfornomarequirements,
  title = {Physical Layer Security for NOMA: Requirements, Merits, Challenges, and Recommendations},
  author = {Haji M. Furqan and Jehad. M. Hamamreh and Huseyin Arslan},
  year = {2019},
  eprint = {1905.05064},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1905.05064v3},
}