@article{facialexpressionrecognitionresearchbased,
  title = {Facial Expression Recognition Research Based on Deep Learning},
  author = {Yongpei Zhu and Hongwei Fan and Kehong Yuan},
  year = {2019},
  eprint = {1904.09737},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1904.09737v3},
}