@article{areviewofthenoninvasivetechniquesfor,
  title = {A Review of the Non-Invasive Techniques for Monitoring Different Aspects of Sleep},
  author = {Zawar Hussain and Quan Z. Sheng and Wei Emma Zhang and Jorge Ortiz and Seyedamin Pouriyeh},
  year = {2021},
  eprint = {2104.12964},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2104.12964v2},
}