@article{acompositionalfeatureembeddingand,
  title = {A Compositional Feature Embedding and Similarity Metric for Ultra-Fine-Grained Visual Categorization},
  author = {Yajie Sun and Miaohua Zhang and Xiaohan Yu and Yi Liao and Yongsheng Gao},
  year = {2021},
  eprint = {2109.12380},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2109.12380v3},
}