@article{domaingapestimationforsourcefree,
  title = {Domain Gap Estimation for Source Free Unsupervised Domain Adaptation with Many Classifiers},
  author = {Ziyang Zong and Jun He and Lei Zhang and Hai Huan},
  year = {2022},
  eprint = {2207.05785},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2207.05785v2},
}