@article{semisupervisedlearningforfaceanti,
  title = {Semi-Supervised learning for Face Anti-Spoofing using Apex frame},
  author = {Usman Muhammad and Mourad Oussalah and Jorma Laaksonen},
  year = {2023},
  eprint = {2309.04958},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2309.04958v1},
}