@misc{shen2023penalty,
  title={On Penalty-based Bilevel Gradient Descent Method},
  author={Han Shen and Quan Xiao and Tianyi Chen},
  year={2023},
  eprint={2302.05185},
  archivePrefix={arXiv},
  primaryClass={cs.LG},
  url={https://arxiv.org/abs/2302.05185}
}