@article{hou2022token,
  title={Token Dropping for Efficient BERT Pretraining},
  author={Hou, Le and Pang, Richard Yuanzhe and Zhou, Tianyi and Wu, Yuexin and Song, Xinying and Song, Xiaodan and Zhou, Denny},
  journal={arXiv preprint arXiv:2203.13240},
  year={2022}
}