@article{theroadto6gtenphysicallayerchallenges,
  title = {The Road to 6G: Ten Physical Layer Challenges for Communications Engineers},
  author = {Michail Matthaiou and Okan Yurduseven and Hien Quoc Ngo and David Morales-Jimenez and Simon L. Cotton and Vincent F. Fusco},
  year = {2020},
  eprint = {2004.07130},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2004.07130v2},
}