@article{xu:sh2023a,
  title={SimPPG: Self-supervised photoplethysmography-based heart-rate estimation via similarity-enhanced instance discrimination},
  author={Bhattachrjee, Soumyadeep and Li, Huining and Xia, Jun and Xu, Wenyao},
  journal={Smart Health},
  pages={100396},
  year={2023},
  publisher={Elsevier}
}