@article{anoteoncategoriesaboutroughsets,
  title = {A Note on Categories about Rough Sets},
  author = {Y. R. Syau and E. B. Lin and C. J. Liau},
  year = {2022},
  eprint = {2205.09672},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2205.09672v1},
}