@article{zhang2022dac,
        title={Divide and Contrast: Source-free Domain Adaptation via Adaptive Contrastive Learning},
        author={Ziyi Zhang and Weikai Chen and Hui Cheng and Zhen Li and Siyuan Li and Liang Lin and Guanbin Li},
        journal={arXiv preprint arXiv:2106.15788},
        year={2022}
  }